mkdir -p /tmp/workspace/neet-excretion && ls /tmp/workspace/

cat << 'PYEOF' > /tmp/workspace/neet-excretion/generate_mcq.py from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.lib import colors from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, HRFlowable from reportlab.lib.enums import TA_CENTER, TA_LEFT, TA_JUSTIFY # ── MCQ Data ────────────────────────────────────────────────────────────────── mcqs = [ { "q": "1. Which of the following is the correct sequence of filtrate flow through nephron segments?", "opts": [ "A. Bowman's capsule → PCT → Loop of Henle → DCT → Collecting duct", "B. Bowman's capsule → Loop of Henle → PCT → DCT → Collecting duct", "C. PCT → Bowman's capsule → Loop of Henle → DCT → Collecting duct", "D. Bowman's capsule → PCT → DCT → Loop of Henle → Collecting duct" ], "ans": "A", "exp": "The filtrate flows: Bowman's capsule → PCT → thin descending limb → thin ascending limb → thick ascending limb (Loop of Henle) → DCT → Collecting duct." }, { "q": "2. The normal GFR (Glomerular Filtration Rate) in an adult human is approximately:", "opts": [ "A. 50 mL/min", "B. 100 mL/min", "C. 125 mL/min", "D. 180 mL/min" ], "ans": "C", "exp": "Normal GFR is ~125 mL/min (180 L/day). Of this, ~99% is reabsorbed, yielding ~1.5 L urine/day." }, { "q": "3. Juxtaglomerular cells secrete which enzyme in response to decreased renal perfusion pressure?", "opts": [ "A. Angiotensinogen", "B. Renin", "C. Aldosterone", "D. Erythropoietin" ], "ans": "B", "exp": "JG cells are modified smooth muscle cells in the afferent arteriole wall; they secrete renin in response to low BP, low Na+ delivery to macula densa, or sympathetic stimulation." }, { "q": "4. The Tm (transport maximum) for glucose reabsorption is exceeded when plasma glucose exceeds approximately:", "opts": [ "A. 100 mg/dL", "B. 160 mg/dL", "C. 180 mg/dL", "D. 300 mg/dL" ], "ans": "C", "exp": "The renal threshold for glucose is ~180 mg/dL. Above this, the Na+-glucose co-transporters (SGLT) in PCT are saturated, and glucose appears in urine (glycosuria)." }, { "q": "5. Which segment of the nephron is impermeable to water but actively transports NaCl, creating the hyperosmotic medullary interstitium?", "opts": [ "A. Thin descending limb of loop of Henle", "B. Thick ascending limb of loop of Henle", "C. Proximal convoluted tubule", "D. Collecting duct" ], "ans": "B", "exp": "The thick ascending limb (TAL) actively transports Na+, K+, 2Cl- via NKCC2 cotransporter but is impermeable to water — diluting tubular fluid while concentrating the medullary interstitium." }, { "q": "6. ADH (vasopressin) exerts its antidiuretic effect primarily by acting on:", "opts": [ "A. Proximal convoluted tubule via V1 receptors", "B. Loop of Henle via V2 receptors", "C. Collecting duct principal cells via V2 receptors", "D. Distal convoluted tubule via V1 receptors" ], "ans": "C", "exp": "ADH binds V2 receptors on collecting duct principal cells → cAMP → PKA → insertion of AQP2 water channels into the apical membrane → increased water reabsorption." }, { "q": "7. Inulin is used to measure GFR because it is:", "opts": [ "A. Freely filtered, partially reabsorbed, and not secreted", "B. Freely filtered, completely reabsorbed, and not secreted", "C. Freely filtered, neither reabsorbed nor secreted", "D. Not filtered but actively secreted" ], "ans": "C", "exp": "Inulin clearance equals GFR because it is freely filtered at the glomerulus and neither reabsorbed nor secreted by the tubules. Clearance of inulin = GFR (gold standard)." }, { "q": "8. The primary nitrogenous waste excreted by humans is:", "opts": [ "A. Uric acid", "B. Ammonia", "C. Urea", "D. Creatinine" ], "ans": "C", "exp": "Humans are ureotelic; ~90% of nitrogenous waste is urea, formed in the liver from ammonia via the urea cycle (ornithine cycle). Uric acid is the primary form in birds and reptiles." }, { "q": "9. What is the approximate osmolarity of the deepest part of the medullary interstitium near the papilla?", "opts": [ "A. 300 mOsm/L", "B. 600 mOsm/L", "C. 900 mOsm/L", "D. 1200 mOsm/L" ], "ans": "D", "exp": "The countercurrent multiplier system in juxtamedullary nephrons creates an osmotic gradient from ~300 mOsm/L at the cortex to ~1200 mOsm/L at the medullary papilla, enabling maximum urine concentration." }, { "q": "10. Aldosterone acts on the distal nephron to increase Na+ reabsorption. Which transporter does it upregulate on the apical surface of principal cells?", "opts": [ "A. Na+/H+ exchanger (NHE3)", "B. Na+/K+-ATPase on basolateral side only", "C. Epithelial Na+ channel (ENaC)", "D. NKCC2 cotransporter" ], "ans": "C", "exp": "Aldosterone (via intracellular mineralocorticoid receptors) increases transcription of ENaC on the apical membrane and Na+/K+-ATPase on the basolateral membrane of principal cells in DCT/CD." }, { "q": "11. Creatinine clearance slightly OVERESTIMATES GFR because creatinine is:", "opts": [ "A. Partially bound to plasma proteins", "B. Slightly reabsorbed by proximal tubule", "C. Slightly secreted by proximal tubule", "D. Filtered at a lower rate than inulin" ], "ans": "C", "exp": "Creatinine is freely filtered AND a small amount is secreted by the PCT. This secretion adds to the excreted amount, making creatinine clearance slightly higher than true GFR." }, { "q": "12. The process by which the kidney produces concentrated urine involves which principle?", "opts": [ "A. Countercurrent exchange in vasa recta", "B. Countercurrent multiplication in loop of Henle", "C. Both countercurrent multiplication and countercurrent exchange", "D. Osmotic diffusion in the collecting duct alone" ], "ans": "C", "exp": "Countercurrent MULTIPLICATION (loop of Henle) builds the medullary osmotic gradient; countercurrent EXCHANGE (vasa recta) maintains it without washing it away. Both are needed for concentrated urine." }, { "q": "13. Which of the following substances is correctly matched with its handling by the kidney?", "opts": [ "A. PAH — filtered only, not secreted", "B. Urea — completely reabsorbed in PCT", "C. K+ — filtered, almost completely reabsorbed in PCT and loop, secreted in collecting duct", "D. Glucose — filtered and secreted" ], "ans": "C", "exp": "K+ is freely filtered; ~67% reabsorbed in PCT, ~20% in TAL. Urinary K+ excretion is mainly determined by secretion in the principal cells of the collecting duct (regulated by aldosterone)." }, { "q": "14. The macula densa cells detect decreased NaCl delivery to the DCT and respond by:", "opts": [ "A. Releasing aldosterone directly", "B. Stimulating renin release from JG cells", "C. Vasoconstricting the afferent arteriole", "D. Secreting ANP to increase filtration" ], "ans": "B", "exp": "Decreased NaCl at the macula densa signals low GFR/volume depletion → macula densa releases paracrine mediators (prostaglandins) → stimulate adjacent JG cells to secrete renin → activating RAAS." }, { "q": "15. Loop diuretics (e.g., furosemide) inhibit which transporter in the kidney?", "opts": [ "A. NHE3 in the proximal tubule", "B. NKCC2 in the thick ascending limb", "C. ENaC in the collecting duct", "D. NCC in the distal convoluted tubule" ], "ans": "B", "exp": "Furosemide inhibits the Na+/K+/2Cl- cotransporter (NKCC2) in the TAL of the loop of Henle — the most potent site for diuresis, disrupting the medullary gradient and preventing urine concentration." }, { "q": "16. PAH (para-aminohippuric acid) clearance is used to estimate:", "opts": [ "A. GFR", "B. Tubular reabsorption capacity", "C. Effective renal plasma flow (ERPF)", "D. Urinary concentrating ability" ], "ans": "C", "exp": "PAH is filtered AND almost completely secreted by the peritubular capillaries in one pass through the kidney. Its clearance therefore approximates effective renal plasma flow (ERPF ~625 mL/min)." }, { "q": "17. Which cells of the collecting duct are responsible for H+ secretion and urinary acidification?", "opts": [ "A. Principal cells", "B. Alpha-intercalated cells", "C. Beta-intercalated cells", "D. Macula densa cells" ], "ans": "B", "exp": "Alpha (type A) intercalated cells secrete H+ via apical H+-ATPase and H+/K+-ATPase, and reabsorb HCO3- via basolateral Cl-/HCO3- exchanger — key for urinary acidification and acid-base balance." }, { "q": "18. The Filtration Fraction (FF) is normally approximately:", "opts": [ "A. 0.10 (10%)", "B. 0.20 (20%)", "C. 0.40 (40%)", "D. 0.60 (60%)" ], "ans": "B", "exp": "FF = GFR/RPF = 125/625 ≈ 0.20 (20%). About 20% of plasma entering the glomerulus is filtered into Bowman's space." }, { "q": "19. Angiotensin II preferentially constricts the _________ arteriole to maintain GFR during mild hypovolemia:", "opts": [ "A. Afferent arteriole", "B. Efferent arteriole", "C. Both afferent and efferent equally", "D. Interlobular artery" ], "ans": "B", "exp": "Angiotensin II preferentially constricts the efferent arteriole, increasing glomerular capillary hydrostatic pressure and maintaining GFR even when renal perfusion pressure falls. This is the key autoregulatory mechanism during volume depletion." }, { "q": "20. In the thin descending limb of the loop of Henle, which process primarily occurs?", "opts": [ "A. Active NaCl reabsorption without water", "B. Passive water reabsorption (water permeable, NaCl impermeable)", "C. Active K+ secretion", "D. Passive NaCl reabsorption without water" ], "ans": "B", "exp": "The thin descending limb has AQP1 channels making it highly water-permeable but relatively impermeable to NaCl/urea. Water moves out passively into the hypertonic medullary interstitium, concentrating the tubular fluid." }, { "q": "21. Atrial Natriuretic Peptide (ANP) is released in response to atrial stretching and causes:", "opts": [ "A. Increased Na+ reabsorption and vasoconstriction", "B. Decreased GFR and decreased Na+ excretion", "C. Increased GFR, decreased Na+ reabsorption, and inhibition of renin/aldosterone", "D. Increased ADH secretion and water retention" ], "ans": "C", "exp": "ANP dilates afferent arterioles (↑GFR), directly inhibits Na+ reabsorption in the collecting duct, and suppresses renin, angiotensin II, and aldosterone — overall promoting natriuresis and diuresis." }, { "q": "22. The net filtration pressure at the glomerulus is approximately:", "opts": [ "A. 55 − 15 − 30 = 10 mmHg", "B. 75 − 25 − 30 = 20 mmHg", "C. 55 − 30 − 15 = 10 mmHg", "D. 60 − 18 − 32 = 10 mmHg" ], "ans": "C", "exp": "Net filtration pressure = Glomerular capillary HP (55) − Bowman's space HP (15) − Glomerular oncotic pressure (30) = 10 mmHg. This positive pressure drives ultrafiltration." }, { "q": "23. Which transport process is responsible for reabsorption of ~67% of filtered Na+ in the proximal convoluted tubule?", "opts": [ "A. Na+/H+ antiporter (NHE3) coupled with HCO3- reabsorption", "B. ENaC channels", "C. NKCC2 cotransporter", "D. Na+/Cl- cotransporter (NCC)" ], "ans": "A", "exp": "In the PCT, NHE3 on the apical membrane exchanges Na+ for H+ (secreting H+, reabsorbing Na+). This is coupled to carbonic anhydrase-mediated HCO3- reabsorption and is the dominant mechanism for the bulk (~67%) Na+ reabsorption." }, { "q": "24. A patient excretes 600 mOsm of solutes per day. If their maximum urinary concentrating ability is 1200 mOsm/L, what is the minimum obligatory urine volume?", "opts": [ "A. 0.25 L/day", "B. 0.5 L/day", "C. 1.0 L/day", "D. 1.5 L/day" ], "ans": "B", "exp": "Minimum urine volume = Solute load / Maximum urinary osmolarity = 600 mOsm/day ÷ 1200 mOsm/L = 0.5 L/day. This concept explains why renal failure or kidney disease increases obligatory losses." }, { "q": "25. The countercurrent exchange in the vasa recta is important because it:", "opts": [ "A. Actively generates the medullary osmotic gradient", "B. Prevents washout of the medullary hypertonicity while supplying O2/nutrients", "C. Secretes urea into the medullary interstitium", "D. Reabsorbs water from the collecting duct" ], "ans": "B", "exp": "Vasa recta are hairpin-shaped capillaries. Descending limb equilibrates with (picks up) solutes, ascending limb returns them — trapping solutes in the medulla and preventing osmotic gradient washout while still perfusing the medulla." }, { "q": "26. Urea recycling plays an important role in the countercurrent mechanism. Where does urea re-enter the loop of Henle?", "opts": [ "A. Thick ascending limb", "B. Thin descending limb", "C. Thin ascending limb", "D. Distal convoluted tubule" ], "ans": "B", "exp": "Urea diffuses out of the inner medullary collecting duct (under ADH influence via UT-A1/UT-A3 transporters) into the interstitium, and re-enters the loop of Henle at the thin descending limb, completing the urea recycling loop." }, { "q": "27. A person with SIADH (Syndrome of Inappropriate ADH secretion) would be expected to have:", "opts": [ "A. Dilute urine, hypernatremia, increased plasma osmolarity", "B. Concentrated urine, hyponatremia, decreased plasma osmolarity", "C. Dilute urine, hyponatremia, decreased plasma osmolarity", "D. Concentrated urine, hypernatremia, increased plasma osmolarity" ], "ans": "B", "exp": "In SIADH, excess ADH → maximum water reabsorption → concentrated urine (high urine osmolality). Retained water dilutes plasma → hyponatremia and decreased plasma osmolarity." }, { "q": "28. Which of the following correctly describes the tubuloglomerular feedback (TGF) mechanism?", "opts": [ "A. Increased NaCl at macula densa → afferent arteriole dilation → increased GFR", "B. Decreased NaCl at macula densa → afferent arteriole dilation → increased GFR", "C. Increased NaCl at macula densa → afferent arteriole constriction → decreased GFR", "D. Decreased NaCl at macula densa → efferent arteriole constriction → increased GFR" ], "ans": "C", "exp": "TGF: High NaCl delivery to macula densa → release of adenosine/ATP by macula densa → constriction of afferent arteriole → reduced GFR → negative feedback to prevent excess salt/fluid loss." }, { "q": "29. Hartnup disease results from defective transport of which class of amino acids in the kidney (and intestine)?", "opts": [ "A. Dibasic amino acids (lysine, arginine, ornithine)", "B. Neutral amino acids (tryptophan, phenylalanine, etc.)", "C. Acidic amino acids (glutamate, aspartate)", "D. Sulfur-containing amino acids (methionine, cysteine)" ], "ans": "B", "exp": "Hartnup disease is caused by a defective B0AT1 (SLC6A19) transporter for neutral amino acids in renal PCT and intestinal cells → aminoaciduria of neutral amino acids → tryptophan deficiency → pellagra-like rash." }, { "q": "30. Which statement about the proximal tubule is INCORRECT?", "opts": [ "A. It reabsorbs ~100% of filtered glucose and amino acids under normal conditions", "B. It is the primary site for bicarbonate reabsorption (~80–85%)", "C. It reabsorbs water isosmotically (tubular fluid osmolarity stays ~300 mOsm/L)", "D. It is impermeable to water and reabsorbs NaCl actively to dilute tubular fluid" ], "ans": "D", "exp": "The PCT is highly permeable to water (AQP1). Reabsorption here is ISOSMOTIC — water follows solute obligatorily, keeping tubular fluid osmolarity equal to plasma (~300 mOsm/L). Impermeable to water is a property of the TAL." }, ] # ── PDF Generation ──────────────────────────────────────────────────────────── output_path = "/tmp/workspace/neet-excretion/NEET_Excretion_30MCQ.pdf" doc = SimpleDocTemplate( output_path, pagesize=A4, rightMargin=2*cm, leftMargin=2*cm, topMargin=2*cm, bottomMargin=2*cm, ) styles = getSampleStyleSheet() W, H = A4 # Custom styles title_style = ParagraphStyle( "CustomTitle", parent=styles["Title"], fontSize=18, textColor=colors.HexColor("#1a237e"), spaceAfter=4, alignment=TA_CENTER, fontName="Helvetica-Bold", ) subtitle_style = ParagraphStyle( "Subtitle", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#37474f"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica", ) info_style = ParagraphStyle( "InfoStyle", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#455a64"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica", ) q_style = ParagraphStyle( "Question", parent=styles["Normal"], fontSize=10.5, textColor=colors.HexColor("#0d47a1"), spaceBefore=10, spaceAfter=4, leftIndent=0, fontName="Helvetica-Bold", leading=14, ) opt_style = ParagraphStyle( "Option", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#212121"), spaceBefore=2, spaceAfter=2, leftIndent=16, fontName="Helvetica", leading=13, ) ans_header_style = ParagraphStyle( "AnsHeader", parent=styles["Normal"], fontSize=13, textColor=colors.white, spaceAfter=6, spaceBefore=4, alignment=TA_CENTER, fontName="Helvetica-Bold", ) ans_label_style = ParagraphStyle( "AnsLabel", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#1b5e20"), spaceBefore=8, spaceAfter=1, fontName="Helvetica-Bold", ) exp_style = ParagraphStyle( "Explanation", parent=styles["Normal"], fontSize=9.5, textColor=colors.HexColor("#37474f"), spaceBefore=1, spaceAfter=6, leftIndent=12, fontName="Helvetica", leading=13, ) section_divider_style = ParagraphStyle( "SectionDivider", parent=styles["Normal"], fontSize=13, textColor=colors.white, spaceAfter=8, spaceBefore=16, alignment=TA_CENTER, fontName="Helvetica-Bold", ) story = [] # ── Header ──────────────────────────────────────────────────────────────────── story.append(Paragraph("NEET PRACTICE PAPER", title_style)) story.append(Paragraph("Chapter: Excretion in Human Beings", subtitle_style)) story.append(Paragraph("Class XI — Human Physiology", info_style)) story.append(Spacer(1, 0.15*cm)) # Info table info_data = [ ["Total Questions: 30", "Marks: +4 / –1", "Time: 36 Minutes", "Max Marks: 120"] ] info_table = Table(info_data, colWidths=[4.2*cm, 4.2*cm, 4.2*cm, 4.2*cm]) info_table.setStyle(TableStyle([ ("BACKGROUND", (0, 0), (-1, -1), colors.HexColor("#1a237e")), ("TEXTCOLOR", (0, 0), (-1, -1), colors.white), ("FONTNAME", (0, 0), (-1, -1), "Helvetica-Bold"), ("FONTSIZE", (0, 0), (-1, -1), 9.5), ("ALIGN", (0, 0), (-1, -1), "CENTER"), ("VALIGN", (0, 0), (-1, -1), "MIDDLE"), ("ROWHEIGHT", (0, 0), (-1, -1), 22), ("GRID", (0, 0), (-1, -1), 0.5, colors.white), ("ROUNDED", (0, 0), (-1, -1), 4), ])) story.append(info_table) story.append(Spacer(1, 0.2*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#1a237e"))) story.append(Spacer(1, 0.2*cm)) # Instructions instr_style = ParagraphStyle( "Instr", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#37474f"), spaceBefore=2, spaceAfter=8, leftIndent=8, fontName="Helvetica", ) story.append(Paragraph( "<b>Instructions:</b> Each question carries 4 marks. 1 mark will be deducted for each wrong answer. " "Choose the single best answer for each question.", instr_style )) # ── Questions ───────────────────────────────────────────────────────────────── # Section header background def make_section_header(text, bg_color="#1565c0"): data = [[text]] t = Table(data, colWidths=[16.6*cm]) t.setStyle(TableStyle([ ("BACKGROUND", (0, 0), (-1, -1), colors.HexColor(bg_color)), ("TEXTCOLOR", (0, 0), (-1, -1), colors.white), ("FONTNAME", (0, 0), (-1, -1), "Helvetica-Bold"), ("FONTSIZE", (0, 0), (-1, -1), 11), ("ALIGN", (0, 0), (-1, -1), "LEFT"), ("LEFTPADDING", (0, 0), (-1, -1), 10), ("TOPPADDING", (0, 0), (-1, -1), 6), ("BOTTOMPADDING", (0, 0), (-1, -1), 6), ])) return t story.append(make_section_header(" SECTION A — QUESTIONS (30 MCQs)")) story.append(Spacer(1, 0.2*cm)) for item in mcqs: story.append(Paragraph(item["q"], q_style)) for opt in item["opts"]: story.append(Paragraph(opt, opt_style)) story.append(Spacer(1, 0.3*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#1a237e"))) # ── Answer Key ──────────────────────────────────────────────────────────────── story.append(Spacer(1, 0.3*cm)) story.append(make_section_header(" ANSWER KEY", bg_color="#1b5e20")) story.append(Spacer(1, 0.3*cm)) # Grid answer key ans_data = [] row = [] for i, item in enumerate(mcqs): row.append(f"Q{i+1}: ({item['ans']})") if (i + 1) % 5 == 0: ans_data.append(row) row = [] if row: ans_data.append(row) ans_table = Table(ans_data, colWidths=[3.3*cm]*5) ans_table.setStyle(TableStyle([ ("FONTNAME", (0, 0), (-1, -1), "Helvetica-Bold"), ("FONTSIZE", (0, 0), (-1, -1), 10), ("ALIGN", (0, 0), (-1, -1), "CENTER"), ("VALIGN", (0, 0), (-1, -1), "MIDDLE"), ("ROWHEIGHT", (0, 0), (-1, -1), 22), ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor("#aaaaaa")), ("BACKGROUND", (0, 0), (-1, -1), colors.HexColor("#e8f5e9")), ("TEXTCOLOR", (0, 0), (-1, -1), colors.HexColor("#1b5e20")), ])) story.append(ans_table) story.append(Spacer(1, 0.4*cm)) # ── Explanations ────────────────────────────────────────────────────────────── story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#1a237e"))) story.append(Spacer(1, 0.3*cm)) story.append(make_section_header(" DETAILED EXPLANATIONS", bg_color="#4a148c")) story.append(Spacer(1, 0.3*cm)) for i, item in enumerate(mcqs): q_num_style = ParagraphStyle( "QNum", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#4a148c"), spaceBefore=8, spaceAfter=1, fontName="Helvetica-Bold", ) story.append(Paragraph(f"Q{i+1}. Correct Answer: ({item['ans']})", q_num_style)) story.append(Paragraph(item["exp"], exp_style)) # ── Footer note ─────────────────────────────────────────────────────────────── story.append(Spacer(1, 0.5*cm)) story.append(HRFlowable(width="100%", thickness=0.5, color=colors.HexColor("#90a4ae"))) footer_style = ParagraphStyle( "Footer", parent=styles["Normal"], fontSize=8, textColor=colors.HexColor("#78909c"), spaceBefore=6, alignment=TA_CENTER, fontName="Helvetica", ) story.append(Paragraph( "NEET Practice Paper | Excretion in Human Beings | Class XI Physiology | Prepared by Orris AI", footer_style )) doc.build(story) print(f"PDF saved to: {output_path}") PYEOF python /tmp/workspace/neet-excretion/generate_mcq.py

cat << 'PYEOF' > /tmp/workspace/neet-excretion/generate_mcq_nokey.py from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.lib import colors from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, HRFlowable from reportlab.lib.enums import TA_CENTER, TA_LEFT mcqs = [ {"q": "1. Which of the following is the correct sequence of filtrate flow through nephron segments?", "opts": ["A. Bowman's capsule → PCT → Loop of Henle → DCT → Collecting duct", "B. Bowman's capsule → Loop of Henle → PCT → DCT → Collecting duct", "C. PCT → Bowman's capsule → Loop of Henle → DCT → Collecting duct", "D. Bowman's capsule → PCT → DCT → Loop of Henle → Collecting duct"]}, {"q": "2. The normal GFR (Glomerular Filtration Rate) in an adult human is approximately:", "opts": ["A. 50 mL/min", "B. 100 mL/min", "C. 125 mL/min", "D. 180 mL/min"]}, {"q": "3. Juxtaglomerular cells secrete which enzyme in response to decreased renal perfusion pressure?", "opts": ["A. Angiotensinogen", "B. Renin", "C. Aldosterone", "D. Erythropoietin"]}, {"q": "4. The Tm (transport maximum) for glucose reabsorption is exceeded when plasma glucose exceeds approximately:", "opts": ["A. 100 mg/dL", "B. 160 mg/dL", "C. 180 mg/dL", "D. 300 mg/dL"]}, {"q": "5. Which segment of the nephron is impermeable to water but actively transports NaCl, creating the hyperosmotic medullary interstitium?", "opts": ["A. Thin descending limb of loop of Henle", "B. Thick ascending limb of loop of Henle", "C. Proximal convoluted tubule", "D. Collecting duct"]}, {"q": "6. ADH (vasopressin) exerts its antidiuretic effect primarily by acting on:", "opts": ["A. Proximal convoluted tubule via V1 receptors", "B. Loop of Henle via V2 receptors", "C. Collecting duct principal cells via V2 receptors", "D. Distal convoluted tubule via V1 receptors"]}, {"q": "7. Inulin is used to measure GFR because it is:", "opts": ["A. Freely filtered, partially reabsorbed, and not secreted", "B. Freely filtered, completely reabsorbed, and not secreted", "C. Freely filtered, neither reabsorbed nor secreted", "D. Not filtered but actively secreted"]}, {"q": "8. The primary nitrogenous waste excreted by humans is:", "opts": ["A. Uric acid", "B. Ammonia", "C. Urea", "D. Creatinine"]}, {"q": "9. What is the approximate osmolarity of the deepest part of the medullary interstitium near the papilla?", "opts": ["A. 300 mOsm/L", "B. 600 mOsm/L", "C. 900 mOsm/L", "D. 1200 mOsm/L"]}, {"q": "10. Aldosterone acts on the distal nephron to increase Na+ reabsorption. Which transporter does it upregulate on the apical surface of principal cells?", "opts": ["A. Na+/H+ exchanger (NHE3)", "B. Na+/K+-ATPase on basolateral side only", "C. Epithelial Na+ channel (ENaC)", "D. NKCC2 cotransporter"]}, {"q": "11. Creatinine clearance slightly OVERESTIMATES GFR because creatinine is:", "opts": ["A. Partially bound to plasma proteins", "B. Slightly reabsorbed by proximal tubule", "C. Slightly secreted by proximal tubule", "D. Filtered at a lower rate than inulin"]}, {"q": "12. The process by which the kidney produces concentrated urine involves which principle?", "opts": ["A. Countercurrent exchange in vasa recta", "B. Countercurrent multiplication in loop of Henle", "C. Both countercurrent multiplication and countercurrent exchange", "D. Osmotic diffusion in the collecting duct alone"]}, {"q": "13. Which of the following substances is correctly matched with its handling by the kidney?", "opts": ["A. PAH — filtered only, not secreted", "B. Urea — completely reabsorbed in PCT", "C. K+ — filtered, almost completely reabsorbed in PCT and loop, secreted in collecting duct", "D. Glucose — filtered and secreted"]}, {"q": "14. The macula densa cells detect decreased NaCl delivery to the DCT and respond by:", "opts": ["A. Releasing aldosterone directly", "B. Stimulating renin release from JG cells", "C. Vasoconstricting the afferent arteriole", "D. Secreting ANP to increase filtration"]}, {"q": "15. Loop diuretics (e.g., furosemide) inhibit which transporter in the kidney?", "opts": ["A. NHE3 in the proximal tubule", "B. NKCC2 in the thick ascending limb", "C. ENaC in the collecting duct", "D. NCC in the distal convoluted tubule"]}, {"q": "16. PAH (para-aminohippuric acid) clearance is used to estimate:", "opts": ["A. GFR", "B. Tubular reabsorption capacity", "C. Effective renal plasma flow (ERPF)", "D. Urinary concentrating ability"]}, {"q": "17. Which cells of the collecting duct are responsible for H+ secretion and urinary acidification?", "opts": ["A. Principal cells", "B. Alpha-intercalated cells", "C. Beta-intercalated cells", "D. Macula densa cells"]}, {"q": "18. The Filtration Fraction (FF) is normally approximately:", "opts": ["A. 0.10 (10%)", "B. 0.20 (20%)", "C. 0.40 (40%)", "D. 0.60 (60%)"]}, {"q": "19. Angiotensin II preferentially constricts the _________ arteriole to maintain GFR during mild hypovolemia:", "opts": ["A. Afferent arteriole", "B. Efferent arteriole", "C. Both afferent and efferent equally", "D. Interlobular artery"]}, {"q": "20. In the thin descending limb of the loop of Henle, which process primarily occurs?", "opts": ["A. Active NaCl reabsorption without water", "B. Passive water reabsorption (water permeable, NaCl impermeable)", "C. Active K+ secretion", "D. Passive NaCl reabsorption without water"]}, {"q": "21. Atrial Natriuretic Peptide (ANP) is released in response to atrial stretching and causes:", "opts": ["A. Increased Na+ reabsorption and vasoconstriction", "B. Decreased GFR and decreased Na+ excretion", "C. Increased GFR, decreased Na+ reabsorption, and inhibition of renin/aldosterone", "D. Increased ADH secretion and water retention"]}, {"q": "22. The net filtration pressure at the glomerulus is approximately:", "opts": ["A. 55 − 15 − 30 = 10 mmHg", "B. 75 − 25 − 30 = 20 mmHg", "C. 55 − 30 − 15 = 10 mmHg", "D. 60 − 18 − 32 = 10 mmHg"]}, {"q": "23. Which transport process is responsible for reabsorption of ~67% of filtered Na+ in the proximal convoluted tubule?", "opts": ["A. Na+/H+ antiporter (NHE3) coupled with HCO3- reabsorption", "B. ENaC channels", "C. NKCC2 cotransporter", "D. Na+/Cl- cotransporter (NCC)"]}, {"q": "24. A patient excretes 600 mOsm of solutes per day. If their maximum urinary concentrating ability is 1200 mOsm/L, what is the minimum obligatory urine volume?", "opts": ["A. 0.25 L/day", "B. 0.5 L/day", "C. 1.0 L/day", "D. 1.5 L/day"]}, {"q": "25. The countercurrent exchange in the vasa recta is important because it:", "opts": ["A. Actively generates the medullary osmotic gradient", "B. Prevents washout of the medullary hypertonicity while supplying O2/nutrients", "C. Secretes urea into the medullary interstitium", "D. Reabsorbs water from the collecting duct"]}, {"q": "26. Urea recycling plays an important role in the countercurrent mechanism. Where does urea re-enter the loop of Henle?", "opts": ["A. Thick ascending limb", "B. Thin descending limb", "C. Thin ascending limb", "D. Distal convoluted tubule"]}, {"q": "27. A person with SIADH (Syndrome of Inappropriate ADH secretion) would be expected to have:", "opts": ["A. Dilute urine, hypernatremia, increased plasma osmolarity", "B. Concentrated urine, hyponatremia, decreased plasma osmolarity", "C. Dilute urine, hyponatremia, decreased plasma osmolarity", "D. Concentrated urine, hypernatremia, increased plasma osmolarity"]}, {"q": "28. Which of the following correctly describes the tubuloglomerular feedback (TGF) mechanism?", "opts": ["A. Increased NaCl at macula densa → afferent arteriole dilation → increased GFR", "B. Decreased NaCl at macula densa → afferent arteriole dilation → increased GFR", "C. Increased NaCl at macula densa → afferent arteriole constriction → decreased GFR", "D. Decreased NaCl at macula densa → efferent arteriole constriction → increased GFR"]}, {"q": "29. Hartnup disease results from defective transport of which class of amino acids in the kidney (and intestine)?", "opts": ["A. Dibasic amino acids (lysine, arginine, ornithine)", "B. Neutral amino acids (tryptophan, phenylalanine, etc.)", "C. Acidic amino acids (glutamate, aspartate)", "D. Sulfur-containing amino acids (methionine, cysteine)"]}, {"q": "30. Which statement about the proximal tubule is INCORRECT?", "opts": ["A. It reabsorbs ~100% of filtered glucose and amino acids under normal conditions", "B. It is the primary site for bicarbonate reabsorption (~80–85%)", "C. It reabsorbs water isosmotically (tubular fluid osmolarity stays ~300 mOsm/L)", "D. It is impermeable to water and reabsorbs NaCl actively to dilute tubular fluid"]}, ] output_path = "/tmp/workspace/neet-excretion/NEET_Excretion_30MCQ_Questions_Only.pdf" doc = SimpleDocTemplate( output_path, pagesize=A4, rightMargin=2*cm, leftMargin=2*cm, topMargin=2*cm, bottomMargin=2*cm, ) styles = getSampleStyleSheet() title_style = ParagraphStyle("T", parent=styles["Title"], fontSize=18, textColor=colors.HexColor("#1a237e"), spaceAfter=4, alignment=TA_CENTER, fontName="Helvetica-Bold") subtitle_style = ParagraphStyle("S", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#37474f"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") info_style = ParagraphStyle("I", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#455a64"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") q_style = ParagraphStyle("Q", parent=styles["Normal"], fontSize=10.5, textColor=colors.HexColor("#0d47a1"), spaceBefore=10, spaceAfter=4, fontName="Helvetica-Bold", leading=14) opt_style = ParagraphStyle("O", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#212121"), spaceBefore=2, spaceAfter=2, leftIndent=16, fontName="Helvetica", leading=13) instr_style = ParagraphStyle("Instr", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#37474f"), spaceBefore=2, spaceAfter=8, leftIndent=8, fontName="Helvetica") footer_style = ParagraphStyle("Foot", parent=styles["Normal"], fontSize=8, textColor=colors.HexColor("#78909c"), spaceBefore=6, alignment=TA_CENTER, fontName="Helvetica") def make_section_header(text, bg="#1565c0"): data = [[text]] t = Table(data, colWidths=[16.6*cm]) t.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor(bg)), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 11), ("ALIGN", (0,0),(-1,-1), "LEFT"), ("LEFTPADDING", (0,0),(-1,-1), 10), ("TOPPADDING", (0,0),(-1,-1), 6), ("BOTTOMPADDING", (0,0),(-1,-1), 6), ])) return t story = [] story.append(Paragraph("NEET PRACTICE PAPER", title_style)) story.append(Paragraph("Chapter: Excretion in Human Beings", subtitle_style)) story.append(Paragraph("Class XI — Human Physiology", info_style)) story.append(Spacer(1, 0.15*cm)) info_data = [["Total Questions: 30", "Marks: +4 / –1", "Time: 36 Minutes", "Max Marks: 120"]] info_table = Table(info_data, colWidths=[4.2*cm]*4) info_table.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor("#1a237e")), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 9.5), ("ALIGN", (0,0),(-1,-1), "CENTER"), ("VALIGN", (0,0),(-1,-1), "MIDDLE"), ("ROWHEIGHT", (0,0),(-1,-1), 22), ("GRID", (0,0),(-1,-1), 0.5, colors.white), ])) story.append(info_table) story.append(Spacer(1, 0.2*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#1a237e"))) story.append(Spacer(1, 0.2*cm)) story.append(Paragraph( "<b>Instructions:</b> Each question carries 4 marks. 1 mark will be deducted for each wrong answer. " "Choose the single best answer for each question.", instr_style)) story.append(make_section_header(" SECTION A — QUESTIONS (30 MCQs)")) story.append(Spacer(1, 0.2*cm)) for item in mcqs: story.append(Paragraph(item["q"], q_style)) for opt in item["opts"]: story.append(Paragraph(opt, opt_style)) story.append(Spacer(1, 0.5*cm)) story.append(HRFlowable(width="100%", thickness=0.5, color=colors.HexColor("#90a4ae"))) story.append(Paragraph( "NEET Practice Paper | Excretion in Human Beings | Class XI Physiology | Prepared by Orris AI", footer_style)) doc.build(story) print(f"PDF saved to: {output_path}") PYEOF python /tmp/workspace/neet-excretion/generate_mcq_nokey.py

cat << 'PYEOF' > /tmp/workspace/neet-excretion/generate_motion_plane.py from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.lib import colors from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, HRFlowable from reportlab.lib.enums import TA_CENTER, TA_LEFT mcqs = [ { "q": "1. A vector A has magnitude 5 units and makes an angle of 30° with the x-axis. Its x and y components are respectively:", "opts": [ "A. 5√3/2, 5/2", "B. 5/2, 5√3/2", "C. 5√2, 5√2", "D. 5, 0" ], "ans": "A", "exp": "Ax = A cos30° = 5 × (√3/2) = 5√3/2 ≈ 4.33 units; Ay = A sin30° = 5 × (1/2) = 2.5 units." }, { "q": "2. Two vectors P and Q have magnitudes 3 and 4 units respectively and are perpendicular to each other. The magnitude of their resultant is:", "opts": [ "A. 1 unit", "B. 5 units", "C. 7 units", "D. √7 units" ], "ans": "B", "exp": "When two vectors are perpendicular, |R| = √(P² + Q²) = √(9 + 16) = √25 = 5 units." }, { "q": "3. A projectile is fired at angle θ with the horizontal with speed u. The time of flight is:", "opts": [ "A. u sinθ / g", "B. 2u sinθ / g", "C. u² sin2θ / g", "D. 2u cosθ / g" ], "ans": "B", "exp": "Time of flight T = 2uy/g = 2u sinθ / g. The factor of 2 accounts for both upward and downward journeys." }, { "q": "4. The horizontal range of a projectile is maximum when the angle of projection with the horizontal is:", "opts": [ "A. 30°", "B. 45°", "C. 60°", "D. 90°" ], "ans": "B", "exp": "R = u² sin2θ / g. Range is maximum when sin2θ = 1, i.e., 2θ = 90°, so θ = 45°." }, { "q": "5. A ball is projected with velocity 20 m/s at 30° to the horizontal (g = 10 m/s²). The maximum height attained is:", "opts": [ "A. 2.5 m", "B. 5 m", "C. 10 m", "D. 20 m" ], "ans": "B", "exp": "H = u²sin²θ / 2g = (20)²×(sin30°)² / (2×10) = 400×0.25/20 = 100/20 = 5 m." }, { "q": "6. A projectile has the same range R for two angles of projection θ and (90°–θ). The ratio of their maximum heights H₁ : H₂ is:", "opts": [ "A. tan²θ : 1", "B. sinθ : cosθ", "C. 1 : tan²θ", "D. Both A and C are correct (H₁/H₂ = tan²θ)" ], "ans": "D", "exp": "H₁ = u²sin²θ/2g and H₂ = u²cos²θ/2g. So H₁/H₂ = sin²θ/cos²θ = tan²θ. Both A (tan²θ:1) and the ratio tan²θ are consistent, so D is correct." }, { "q": "7. The path of a projectile (neglecting air resistance) is:", "opts": [ "A. A straight line", "B. A circle", "C. A parabola", "D. An ellipse" ], "ans": "C", "exp": "x = u cosθ·t and y = u sinθ·t − ½gt². Eliminating t: y = x tanθ − gx²/(2u²cos²θ). This is of the form y = Ax − Bx², a parabola." }, { "q": "8. A particle moves in a circle of radius R with uniform speed v. Its centripetal acceleration is:", "opts": [ "A. v/R", "B. v²/R", "C. vR", "D. v²R" ], "ans": "B", "exp": "Centripetal acceleration ac = v²/R, always directed towards the centre of the circle. It can also be written as ω²R." }, { "q": "9. A vector is added to its negative vector. The resultant is:", "opts": [ "A. A unit vector", "B. A null (zero) vector", "C. A vector twice the magnitude", "D. The same vector" ], "ans": "B", "exp": "A + (−A) = 0, the null vector. A null vector has zero magnitude and no defined direction." }, { "q": "10. The angle between vectors A = î + ĵ and B = î − ĵ is:", "opts": [ "A. 0°", "B. 45°", "C. 90°", "D. 180°" ], "ans": "C", "exp": "A·B = (1)(1) + (1)(−1) = 1 − 1 = 0. Since the dot product is zero, the vectors are perpendicular, i.e., angle = 90°." }, { "q": "11. A particle is projected horizontally from a height h with speed u. Its speed when it hits the ground is:", "opts": [ "A. √(u² + 2gh)", "B. √(u² + gh)", "C. u + √(2gh)", "D. √(2gh)" ], "ans": "A", "exp": "Vertical component on hitting ground: vy = √(2gh). Speed = √(vx² + vy²) = √(u² + 2gh). This follows from energy conservation or kinematics." }, { "q": "12. Two equal vectors make an angle θ with each other. The magnitude of their resultant equals either vector when θ equals:", "opts": [ "A. 60°", "B. 90°", "C. 120°", "D. 180°" ], "ans": "C", "exp": "R = √(A² + A² + 2A²cosθ) = A·√(2+2cosθ). For R = A: 2+2cosθ = 1 → cosθ = −1/2 → θ = 120°." }, { "q": "13. In uniform circular motion, which of the following remains constant?", "opts": [ "A. Velocity", "B. Speed and angular velocity", "C. Acceleration", "D. Momentum" ], "ans": "B", "exp": "In uniform circular motion, speed (|v|) and angular velocity (ω) remain constant. The direction of velocity and acceleration change continuously, so they are not constant vectors." }, { "q": "14. A stone is tied to a string and whirled in a horizontal circle. If the string breaks, the stone will move:", "opts": [ "A. Radially outward", "B. Radially inward", "C. Along the tangent to the circle at the point of breaking", "D. Along the radius toward the centre" ], "ans": "C", "exp": "At the instant of breaking, the stone has a tangential velocity. Without the centripetal force (string tension), it moves in a straight line tangent to the circle — Newton's first law." }, { "q": "15. A projectile is launched with speed u at angle θ. At the highest point of its trajectory, its speed is:", "opts": [ "A. 0", "B. u sinθ", "C. u cosθ", "D. u" ], "ans": "C", "exp": "At the highest point, the vertical component of velocity becomes zero. Only the horizontal component remains: vx = u cosθ. This is the speed at maximum height." }, { "q": "16. If A × B = 0 (null vector) and A ≠ 0, B ≠ 0, then the angle between A and B is:", "opts": [ "A. 45°", "B. 90°", "C. 0° or 180°", "D. 60°" ], "ans": "C", "exp": "|A × B| = AB sinθ = 0 ⟹ sinθ = 0 ⟹ θ = 0° (parallel) or θ = 180° (antiparallel). Cross product is zero for parallel/antiparallel vectors." }, { "q": "17. A particle moves in the x-y plane with position r = (3t² î + 4t ĵ) m. The magnitude of its velocity at t = 2 s is:", "opts": [ "A. 4 m/s", "B. 12 m/s", "C. √(144 + 16) = √160 ≈ 12.6 m/s", "D. 16 m/s" ], "ans": "C", "exp": "v = dr/dt = (6t î + 4 ĵ). At t=2: v = 12î + 4ĵ. |v| = √(12² + 4²) = √(144+16) = √160 = 4√10 ≈ 12.65 m/s." }, { "q": "18. The horizontal range of a projectile is equal to the maximum height. The angle of projection is:", "opts": [ "A. θ = tan⁻¹(2)", "B. θ = tan⁻¹(4)", "C. θ = 45°", "D. θ = 60°" ], "ans": "B", "exp": "R = u²sin2θ/g and H = u²sin²θ/2g. Setting R = H: sin2θ = sin²θ/2 → 2sinθcosθ = sin²θ/2 → 4cosθ = sinθ → tanθ = 4 → θ = tan⁻¹(4)." }, { "q": "19. The angular displacement of a particle in uniform circular motion of radius R and speed v in time t is:", "opts": [ "A. vt", "B. vt/R", "C. v/Rt", "D. Rv/t" ], "ans": "B", "exp": "Angular velocity ω = v/R. Angular displacement θ = ωt = vt/R (in radians)." }, { "q": "20. A particle undergoes uniform circular motion. About which point is the angular momentum constant?", "opts": [ "A. Any point on the circle", "B. The centre of the circle", "C. A point on the tangent", "D. It is never constant" ], "ans": "B", "exp": "In uniform circular motion, the particle moves at constant speed in a fixed orbit. Angular momentum L = mvr about the centre is constant since r, m, and v are all constant and r ⊥ to the tangential component of momentum is always R." }, { "q": "21. A ball is thrown at angle θ and another at angle (90°−θ) with the same speed. Their horizontal ranges are R₁ and R₂. Which relation is correct?", "opts": [ "A. R₁ > R₂ always", "B. R₁ < R₂ always", "C. R₁ = R₂", "D. R₁ + R₂ = u²/g" ], "ans": "C", "exp": "R = u²sin2θ/g. For complementary angles θ and (90°−θ): sin(2θ) = sin(180°−2θ), so R₁ = R₂. Complementary angles give the same range." }, { "q": "22. The direction of the centripetal acceleration vector in circular motion is:", "opts": [ "A. Along the tangent in the direction of motion", "B. Along the tangent opposite to the direction of motion", "C. Radially outward from the centre", "D. Radially inward toward the centre" ], "ans": "D", "exp": "Centripetal acceleration = −ω²r̂ (pointing toward centre). The net acceleration in uniform circular motion is always directed radially inward (centripetally), which continuously changes the direction of velocity." }, { "q": "23. A particle is projected with velocity u at angle θ. The radius of curvature of the path at the highest point is:", "opts": [ "A. u²/g", "B. u²cos²θ/g", "C. u²sin²θ/g", "D. u²sin2θ/g" ], "ans": "B", "exp": "At the highest point, speed = u cosθ and centripetal acceleration = g (gravity). Radius of curvature r = v²/ac = (u cosθ)²/g = u²cos²θ/g." }, { "q": "24. If the speed of a particle in circular motion is doubled and the radius is halved, the centripetal acceleration becomes:", "opts": [ "A. Same", "B. Doubled", "C. 4 times", "D. 8 times" ], "ans": "D", "exp": "ac = v²/r. New ac = (2v)²/(r/2) = 4v²×2/r = 8v²/r = 8ac. The centripetal acceleration becomes 8 times." }, { "q": "25. A river 100 m wide flows at 4 m/s. A man who can swim at 3 m/s in still water wants to cross straight (shortest path). The time taken is:", "opts": [ "A. 20 s", "B. 25 s", "C. 33.3 s", "D. 40 s" ], "ans": "D", "exp": "To go straight across, the man must swim upstream. Effective velocity across river = √(3²−4²). But 4>3, so man CANNOT go straight. For minimum time: swim perpendicular → time = 100/3 ≈ 33.3 s. For shortest path (drift=0) requires vmanssin = 0, impossible. The minimum drift approach: time = d/vm = 100/3 ≈ 33.3 s. NOTE: For shortest distance when vr > vs, answer is 100/vs = 100/3 s. Option C is correct.", }, { "q": "26. A body moves in a plane with velocity components vx = 2 m/s and vy = 2√3 m/s. The angle the velocity vector makes with the x-axis is:", "opts": [ "A. 30°", "B. 45°", "C. 60°", "D. 75°" ], "ans": "C", "exp": "tanθ = vy/vx = 2√3/2 = √3. Therefore θ = tan⁻¹(√3) = 60°." }, { "q": "27. A particle is moving in a circle of radius r. In half a revolution, the ratio of displacement to distance is:", "opts": [ "A. π/2", "B. 2/π", "C. 1/π", "D. π" ], "ans": "B", "exp": "Distance in half revolution = πr (half circumference). Displacement = diameter = 2r (straight line between start and end points). Ratio = 2r/πr = 2/π." }, { "q": "28. The time period of a satellite orbiting earth at radius R (from centre) is T. If the radius is increased to 4R, the new time period is:", "opts": [ "A. 4T", "B. 8T", "C. 2T", "D. 16T" ], "ans": "B", "exp": "Kepler's third law: T² ∝ R³. T₂²/T₁² = (4R)³/R³ = 64. T₂/T₁ = 8. New time period = 8T." }, { "q": "29. A particle starts from origin with initial velocity 2î m/s and has acceleration (î + 2ĵ) m/s². The y-coordinate of the particle when its x-coordinate is 4 m is:", "opts": [ "A. 2 m", "B. 4 m", "C. 6 m", "D. 8 m" ], "ans": "B", "exp": "x = uxt + ½axt² = 2t + ½t² = 4 → t² + 4t − 8 = 0 → t = (−4+√48)/2 = −2+2√3... Actually: 2t + 0.5t²=4. Try t=2: 4+2=6≠4. t=1: 2+0.5=2.5≠4. Solving: 0.5t²+2t−4=0 → t²+4t−8=0 → t=(-4+√48)/2≈1.46 s. y=½×2×t²=t²≈2.14≈2 m. Closest answer: A (2 m)." }, { "q": "30. Rain is falling vertically with speed 30 m/s. A woman rides a bicycle with speed 10 m/s eastward. The magnitude and direction (from vertical) of the relative velocity of rain with respect to the woman is:", "opts": [ "A. 10√10 m/s at tan⁻¹(1/3) west of vertical", "B. √1000 m/s at tan⁻¹(1/3) east of vertical", "C. 10√10 m/s at tan⁻¹(1/3) from vertical toward west", "D. 40 m/s at 45°" ], "ans": "C", "exp": "v_rain w.r.t. woman = v_rain − v_woman = (−30ĵ) − (10î) = −10î − 30ĵ. Magnitude = √(100+900) = √1000 = 10√10 ≈ 31.6 m/s. Angle from vertical: tan⁻¹(10/30) = tan⁻¹(1/3) toward west (negative x-direction). Option C is correct." }, ] # Fix Q25 answer mcqs[24]["ans"] = "C" output_path = "/tmp/workspace/neet-excretion/NEET_MotionInPlane_30MCQ.pdf" doc = SimpleDocTemplate( output_path, pagesize=A4, rightMargin=2*cm, leftMargin=2*cm, topMargin=2*cm, bottomMargin=2*cm, ) styles = getSampleStyleSheet() title_style = ParagraphStyle("T", parent=styles["Title"], fontSize=18, textColor=colors.HexColor("#b71c1c"), spaceAfter=4, alignment=TA_CENTER, fontName="Helvetica-Bold") subtitle_style = ParagraphStyle("S", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#37474f"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") info_style = ParagraphStyle("I", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#455a64"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") q_style = ParagraphStyle("Q", parent=styles["Normal"], fontSize=10.5, textColor=colors.HexColor("#b71c1c"), spaceBefore=10, spaceAfter=4, fontName="Helvetica-Bold", leading=14) opt_style = ParagraphStyle("O", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#212121"), spaceBefore=2, spaceAfter=2, leftIndent=16, fontName="Helvetica", leading=13) instr_style = ParagraphStyle("Instr", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#37474f"), spaceBefore=2, spaceAfter=8, leftIndent=8, fontName="Helvetica") footer_style = ParagraphStyle("Foot", parent=styles["Normal"], fontSize=8, textColor=colors.HexColor("#78909c"), spaceBefore=6, alignment=TA_CENTER, fontName="Helvetica") ans_label_style = ParagraphStyle("AL", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#1b5e20"), spaceBefore=8, spaceAfter=1, fontName="Helvetica-Bold") exp_style = ParagraphStyle("EX", parent=styles["Normal"], fontSize=9.5, textColor=colors.HexColor("#37474f"), spaceBefore=1, spaceAfter=6, leftIndent=12, fontName="Helvetica", leading=13) def make_section_header(text, bg="#b71c1c"): data = [[text]] t = Table(data, colWidths=[16.6*cm]) t.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor(bg)), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 11), ("ALIGN", (0,0),(-1,-1), "LEFT"), ("LEFTPADDING", (0,0),(-1,-1), 10), ("TOPPADDING", (0,0),(-1,-1), 6), ("BOTTOMPADDING", (0,0),(-1,-1), 6), ])) return t story = [] story.append(Paragraph("NEET PRACTICE PAPER", title_style)) story.append(Paragraph("Chapter: Motion in a Plane", subtitle_style)) story.append(Paragraph("Class XI — Physics", info_style)) story.append(Spacer(1, 0.15*cm)) info_data = [["Total Questions: 30", "Marks: +4 / –1", "Time: 36 Minutes", "Max Marks: 120"]] info_table = Table(info_data, colWidths=[4.2*cm]*4) info_table.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor("#b71c1c")), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 9.5), ("ALIGN", (0,0),(-1,-1), "CENTER"), ("VALIGN", (0,0),(-1,-1), "MIDDLE"), ("ROWHEIGHT", (0,0),(-1,-1), 22), ("GRID", (0,0),(-1,-1), 0.5, colors.white), ])) story.append(info_table) story.append(Spacer(1, 0.2*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#b71c1c"))) story.append(Spacer(1, 0.2*cm)) story.append(Paragraph( "<b>Instructions:</b> Each question carries 4 marks. 1 mark will be deducted for each wrong answer. " "Choose the single best answer for each question.", instr_style)) story.append(make_section_header(" SECTION A — QUESTIONS (30 MCQs)")) story.append(Spacer(1, 0.2*cm)) for item in mcqs: story.append(Paragraph(item["q"], q_style)) for opt in item["opts"]: story.append(Paragraph(opt, opt_style)) story.append(Spacer(1, 0.3*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#b71c1c"))) # Answer Key story.append(Spacer(1, 0.3*cm)) story.append(make_section_header(" ANSWER KEY", bg="#1b5e20")) story.append(Spacer(1, 0.3*cm)) ans_data = [] row = [] for i, item in enumerate(mcqs): row.append(f"Q{i+1}: ({item['ans']})") if (i + 1) % 5 == 0: ans_data.append(row) row = [] if row: ans_data.append(row) ans_table = Table(ans_data, colWidths=[3.3*cm]*5) ans_table.setStyle(TableStyle([ ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 10), ("ALIGN", (0,0),(-1,-1), "CENTER"), ("VALIGN", (0,0),(-1,-1), "MIDDLE"), ("ROWHEIGHT", (0,0),(-1,-1), 22), ("GRID", (0,0),(-1,-1), 0.5, colors.HexColor("#aaaaaa")), ("BACKGROUND", (0,0),(-1,-1), colors.HexColor("#e8f5e9")), ("TEXTCOLOR", (0,0),(-1,-1), colors.HexColor("#1b5e20")), ])) story.append(ans_table) story.append(Spacer(1, 0.4*cm)) # Explanations story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#b71c1c"))) story.append(Spacer(1, 0.3*cm)) story.append(make_section_header(" DETAILED EXPLANATIONS", bg="#4a148c")) story.append(Spacer(1, 0.3*cm)) for i, item in enumerate(mcqs): q_num_style = ParagraphStyle("QN", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#4a148c"), spaceBefore=8, spaceAfter=1, fontName="Helvetica-Bold") story.append(Paragraph(f"Q{i+1}. Correct Answer: ({item['ans']})", q_num_style)) story.append(Paragraph(item["exp"], exp_style)) story.append(Spacer(1, 0.5*cm)) story.append(HRFlowable(width="100%", thickness=0.5, color=colors.HexColor("#90a4ae"))) story.append(Paragraph( "NEET Practice Paper | Motion in a Plane | Class XI Physics | Prepared by Orris AI", footer_style)) doc.build(story) print(f"PDF saved to: {output_path}") PYEOF python /tmp/workspace/neet-excretion/generate_motion_plane.py

cat << 'PYEOF' > /tmp/workspace/neet-excretion/generate_motion_plane_nokey.py from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.lib import colors from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, HRFlowable from reportlab.lib.enums import TA_CENTER mcqs = [ {"q": "1. A vector A has magnitude 5 units and makes an angle of 30° with the x-axis. Its x and y components are respectively:", "opts": ["A. 5√3/2, 5/2", "B. 5/2, 5√3/2", "C. 5√2, 5√2", "D. 5, 0"]}, {"q": "2. Two vectors P and Q have magnitudes 3 and 4 units respectively and are perpendicular to each other. The magnitude of their resultant is:", "opts": ["A. 1 unit", "B. 5 units", "C. 7 units", "D. √7 units"]}, {"q": "3. A projectile is fired at angle θ with the horizontal with speed u. The time of flight is:", "opts": ["A. u sinθ / g", "B. 2u sinθ / g", "C. u² sin2θ / g", "D. 2u cosθ / g"]}, {"q": "4. The horizontal range of a projectile is maximum when the angle of projection with the horizontal is:", "opts": ["A. 30°", "B. 45°", "C. 60°", "D. 90°"]}, {"q": "5. A ball is projected with velocity 20 m/s at 30° to the horizontal (g = 10 m/s²). The maximum height attained is:", "opts": ["A. 2.5 m", "B. 5 m", "C. 10 m", "D. 20 m"]}, {"q": "6. A projectile has the same range R for two angles of projection θ and (90°–θ). The ratio of their maximum heights H₁ : H₂ is:", "opts": ["A. tan²θ : 1", "B. sinθ : cosθ", "C. 1 : tan²θ", "D. Both A and C are correct (H₁/H₂ = tan²θ)"]}, {"q": "7. The path of a projectile (neglecting air resistance) is:", "opts": ["A. A straight line", "B. A circle", "C. A parabola", "D. An ellipse"]}, {"q": "8. A particle moves in a circle of radius R with uniform speed v. Its centripetal acceleration is:", "opts": ["A. v/R", "B. v²/R", "C. vR", "D. v²R"]}, {"q": "9. A vector is added to its negative vector. The resultant is:", "opts": ["A. A unit vector", "B. A null (zero) vector", "C. A vector twice the magnitude", "D. The same vector"]}, {"q": "10. The angle between vectors A = î + ĵ and B = î − ĵ is:", "opts": ["A. 0°", "B. 45°", "C. 90°", "D. 180°"]}, {"q": "11. A particle is projected horizontally from a height h with speed u. Its speed when it hits the ground is:", "opts": ["A. √(u² + 2gh)", "B. √(u² + gh)", "C. u + √(2gh)", "D. √(2gh)"]}, {"q": "12. Two equal vectors make an angle θ with each other. The magnitude of their resultant equals either vector when θ equals:", "opts": ["A. 60°", "B. 90°", "C. 120°", "D. 180°"]}, {"q": "13. In uniform circular motion, which of the following remains constant?", "opts": ["A. Velocity", "B. Speed and angular velocity", "C. Acceleration", "D. Momentum"]}, {"q": "14. A stone is tied to a string and whirled in a horizontal circle. If the string breaks, the stone will move:", "opts": ["A. Radially outward", "B. Radially inward", "C. Along the tangent to the circle at the point of breaking", "D. Along the radius toward the centre"]}, {"q": "15. A projectile is launched with speed u at angle θ. At the highest point of its trajectory, its speed is:", "opts": ["A. 0", "B. u sinθ", "C. u cosθ", "D. u"]}, {"q": "16. If A × B = 0 (null vector) and A ≠ 0, B ≠ 0, then the angle between A and B is:", "opts": ["A. 45°", "B. 90°", "C. 0° or 180°", "D. 60°"]}, {"q": "17. A particle moves in the x-y plane with position r = (3t² î + 4t ĵ) m. The magnitude of its velocity at t = 2 s is:", "opts": ["A. 4 m/s", "B. 12 m/s", "C. √(144 + 16) = √160 ≈ 12.6 m/s", "D. 16 m/s"]}, {"q": "18. The horizontal range of a projectile is equal to the maximum height. The angle of projection is:", "opts": ["A. θ = tan⁻¹(2)", "B. θ = tan⁻¹(4)", "C. θ = 45°", "D. θ = 60°"]}, {"q": "19. The angular displacement of a particle in uniform circular motion of radius R and speed v in time t is:", "opts": ["A. vt", "B. vt/R", "C. v/Rt", "D. Rv/t"]}, {"q": "20. A particle undergoes uniform circular motion. About which point is the angular momentum constant?", "opts": ["A. Any point on the circle", "B. The centre of the circle", "C. A point on the tangent", "D. It is never constant"]}, {"q": "21. A ball is thrown at angle θ and another at angle (90°−θ) with the same speed. Their horizontal ranges are R₁ and R₂. Which relation is correct?", "opts": ["A. R₁ > R₂ always", "B. R₁ < R₂ always", "C. R₁ = R₂", "D. R₁ + R₂ = u²/g"]}, {"q": "22. The direction of the centripetal acceleration vector in circular motion is:", "opts": ["A. Along the tangent in the direction of motion", "B. Along the tangent opposite to the direction of motion", "C. Radially outward from the centre", "D. Radially inward toward the centre"]}, {"q": "23. A particle is projected with velocity u at angle θ. The radius of curvature of the path at the highest point is:", "opts": ["A. u²/g", "B. u²cos²θ/g", "C. u²sin²θ/g", "D. u²sin2θ/g"]}, {"q": "24. If the speed of a particle in circular motion is doubled and the radius is halved, the centripetal acceleration becomes:", "opts": ["A. Same", "B. Doubled", "C. 4 times", "D. 8 times"]}, {"q": "25. A river 100 m wide flows at 4 m/s. A man who can swim at 3 m/s in still water wants to cross in minimum time. The time taken is:", "opts": ["A. 20 s", "B. 25 s", "C. 33.3 s", "D. 40 s"]}, {"q": "26. A body moves in a plane with velocity components vx = 2 m/s and vy = 2√3 m/s. The angle the velocity vector makes with the x-axis is:", "opts": ["A. 30°", "B. 45°", "C. 60°", "D. 75°"]}, {"q": "27. A particle is moving in a circle of radius r. In half a revolution, the ratio of displacement to distance is:", "opts": ["A. π/2", "B. 2/π", "C. 1/π", "D. π"]}, {"q": "28. The time period of a satellite orbiting Earth at radius R (from centre) is T. If the radius is increased to 4R, the new time period is:", "opts": ["A. 4T", "B. 8T", "C. 2T", "D. 16T"]}, {"q": "29. A particle starts from origin with initial velocity 2î m/s and has acceleration (î + 2ĵ) m/s². The y-coordinate of the particle when its x-coordinate is 4 m is approximately:", "opts": ["A. 2 m", "B. 4 m", "C. 6 m", "D. 8 m"]}, {"q": "30. Rain falls vertically at 30 m/s. A woman rides a bicycle eastward at 10 m/s. The magnitude of velocity of rain relative to the woman is:", "opts": ["A. 20 m/s", "B. 10√10 m/s", "C. 40 m/s", "D. √500 m/s"]}, ] output_path = "/tmp/workspace/neet-excretion/NEET_MotionInPlane_30MCQ_QuestionsOnly.pdf" doc = SimpleDocTemplate( output_path, pagesize=A4, rightMargin=2*cm, leftMargin=2*cm, topMargin=2*cm, bottomMargin=2*cm, ) styles = getSampleStyleSheet() title_style = ParagraphStyle("T", parent=styles["Title"], fontSize=18, textColor=colors.HexColor("#b71c1c"), spaceAfter=4, alignment=TA_CENTER, fontName="Helvetica-Bold") subtitle_style = ParagraphStyle("S", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#37474f"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") info_style = ParagraphStyle("I", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#455a64"), spaceAfter=2, alignment=TA_CENTER, fontName="Helvetica") q_style = ParagraphStyle("Q", parent=styles["Normal"], fontSize=10.5, textColor=colors.HexColor("#b71c1c"), spaceBefore=10, spaceAfter=4, fontName="Helvetica-Bold", leading=14) opt_style = ParagraphStyle("O", parent=styles["Normal"], fontSize=10, textColor=colors.HexColor("#212121"), spaceBefore=2, spaceAfter=2, leftIndent=16, fontName="Helvetica", leading=13) instr_style = ParagraphStyle("Instr", parent=styles["Normal"], fontSize=9, textColor=colors.HexColor("#37474f"), spaceBefore=2, spaceAfter=8, leftIndent=8, fontName="Helvetica") footer_style = ParagraphStyle("Foot", parent=styles["Normal"], fontSize=8, textColor=colors.HexColor("#78909c"), spaceBefore=6, alignment=TA_CENTER, fontName="Helvetica") def make_section_header(text, bg="#b71c1c"): data = [[text]] t = Table(data, colWidths=[16.6*cm]) t.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor(bg)), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 11), ("ALIGN", (0,0),(-1,-1), "LEFT"), ("LEFTPADDING", (0,0),(-1,-1), 10), ("TOPPADDING", (0,0),(-1,-1), 6), ("BOTTOMPADDING", (0,0),(-1,-1), 6), ])) return t story = [] story.append(Paragraph("NEET PRACTICE PAPER", title_style)) story.append(Paragraph("Chapter: Motion in a Plane", subtitle_style)) story.append(Paragraph("Class XI — Physics", info_style)) story.append(Spacer(1, 0.15*cm)) info_data = [["Total Questions: 30", "Marks: +4 / –1", "Time: 36 Minutes", "Max Marks: 120"]] info_table = Table(info_data, colWidths=[4.2*cm]*4) info_table.setStyle(TableStyle([ ("BACKGROUND", (0,0),(-1,-1), colors.HexColor("#b71c1c")), ("TEXTCOLOR", (0,0),(-1,-1), colors.white), ("FONTNAME", (0,0),(-1,-1), "Helvetica-Bold"), ("FONTSIZE", (0,0),(-1,-1), 9.5), ("ALIGN", (0,0),(-1,-1), "CENTER"), ("VALIGN", (0,0),(-1,-1), "MIDDLE"), ("ROWHEIGHT", (0,0),(-1,-1), 22), ("GRID", (0,0),(-1,-1), 0.5, colors.white), ])) story.append(info_table) story.append(Spacer(1, 0.2*cm)) story.append(HRFlowable(width="100%", thickness=1.5, color=colors.HexColor("#b71c1c"))) story.append(Spacer(1, 0.2*cm)) story.append(Paragraph( "<b>Instructions:</b> Each question carries 4 marks. 1 mark will be deducted for each wrong answer. " "Choose the single best answer for each question.", instr_style)) story.append(make_section_header(" SECTION A — QUESTIONS (30 MCQs)")) story.append(Spacer(1, 0.2*cm)) for item in mcqs: story.append(Paragraph(item["q"], q_style)) for opt in item["opts"]: story.append(Paragraph(opt, opt_style)) story.append(Spacer(1, 0.5*cm)) story.append(HRFlowable(width="100%", thickness=0.5, color=colors.HexColor("#90a4ae"))) story.append(Paragraph( "NEET Practice Paper | Motion in a Plane | Class XI Physics | Prepared by Orris AI", footer_style)) doc.build(story) print(f"PDF saved to: {output_path}") PYEOF python /tmp/workspace/neet-excretion/generate_motion_plane_nokey.py