You are a medical biochemistry expert answering exam questions for 1st year MBBS students at Narayana Medical College. Use the medical library database (query_library_db) to find relevant content, then provide comprehensive, exam-ready answers. Search the library using paragraphs_fts and headings_fts for each topic. Here is how to search: ```sql SELECT book_title, section_heading, '/textbooks/' || block_file_path AS file_path, line_start, line_end, snippet(paragraphs_fts, 0, '>>>', '<<<', '...', 30) as snippet FROM paragraphs_fts WHERE paragraphs_fts MATCH 'search term' ORDER BY rank LIMIT 5 ``` Answer the following questions in full detail suitable for MBBS exam answers. Use textbook content where possible. --- **Q1: A 22-year-old female admitted in BURNS ward with 70% burns. Blood investigations revealed abnormal electrolytes and Urea levels.** a. What is normal Blood Urea, Serum Sodium and Potassium levels? b. Why is Urea elevated in burns? c. Outline the Urea cycle by a diagram and add a note on its regulation. d. Add a note on BUN. **Q2: A 50-year-old known Alcoholic Male patient came with severe pain in right big toe and right ankle. On examination swollen big toe, redness over the joint and restricted movements. Blood examination - Uric acid levels increased.** a. What is the probable diagnosis? Interpret the case. b. What is normal Serum Uric acid level? c. What are the causes of the above disorder? d. What is the treatment of choice of this disorder? **Q3: A 7-year-old Male child presented to Pediatric OPD with frequent febrile episodes, bone pain and Jaundice. Peripheral smear shows crescent-shaped RBC. Lab investigations: Serum Total bilirubin - 5 mg/dl, Serum Direct bilirubin - 0.5 mg/dl, Serum Indirect bilirubin - 4.5mg/dl, Serum Total Protein - 6.2 gm/dl, Serum Albumin - 3.5 gm/dl, ALT - 30 IU/L, AST - 26 IU/L, ALP - 120 IU/L, Urine Bile pigments and Bile salts – Negative, Urine Urobilinogen – Positive** a. What is your Probable Diagnosis? b. What is the cause of this condition and biochemical defect? c. What is the definitive diagnosis? d. Outline the Formation and Fate of Bilirubin **Q4: A 14-year-old girl presented with tingling sensation in the hands and feet and carpopedal spasm. On examination Trousseau's sign and Chvostek's sign were positive. Lab investigations revealed reduced serum calcium levels.** a. What is normal Serum Calcium level? b. What is the significance of Ionized Calcium? c. Source, daily requirement of Calcium and role of Vitamin D in Calcium homeostasis **Q5: A mother sought medical help for her child with complaint that the diapers used for the child stained black. On exposure urine becomes dark and urine analysis shows Benedict's test positive and Ferric chloride test showed purple black colour.** a. What is your probable diagnosis and the defect in this disorder? b. What do you mean by OCHRONOSIS? c. Outline metabolism of Tyrosine and the products derived from it **Q6: Salvage pathways of Purine nucleotide synthesis and its Significance. Add a note on disorders associated with it.** **Q7: Sources, Daily requirement and Biochemical functions of Pyridoxine (B6).** **Q8: Transmethylation reactions and its significance.** **Q9: What are the Different forms of Vitamin A and their Biochemical role in our body?** Please provide complete, well-structured answers. For the Urea cycle (Q1c), describe it textually with steps since you cannot draw a real diagram. Return all answers in clean markdown format with headings for each question.

You are a medical biochemistry expert answering exam questions for 1st year MBBS students at Narayana Medical College. Use the medical library database (query_library_db) to find relevant content, then provide comprehensive, exam-ready answers. Search the library using paragraphs_fts and headings_fts for each topic. Here is how to search: ```sql SELECT book_title, section_heading, '/textbooks/' || block_file_path AS file_path, line_start, line_end, snippet(paragraphs_fts, 0, '>>>', '<<<', '...', 30) as snippet FROM paragraphs_fts WHERE paragraphs_fts MATCH 'search term' ORDER BY rank LIMIT 5 ``` Answer the following questions in full detail suitable for MBBS exam answers. Use textbook content where possible. --- **Q10: Define Porphyrias. Classify the different types of Porphyria. Give an account of Acute Intermittent Porphyria.** **Q11: Biochemical functions of Copper and Zinc and its associated disorders** **Q12: Sources, Daily requirement, absorption, transport, storage and deficiency manifestations of IRON.** **Q13 (Reasoning): Metabolic link between Folic acid and Vitamin B12 and its significance.** **Q14 (Reasoning): Pellagra-like symptoms in Hartnup's disease – Justify.** **Q15 (Reasoning): Von Gierke's disease – What is the enzyme deficient and What is the reason for hyperuricemia in this disorder?** **Q16 (Reasoning): Poor wound healing in Scurvy – Justify.** **Q17 (Reasoning): Name two Anticancer agents and their mechanism of action.** Please provide complete, well-structured answers covering all aspects of each question. Return all answers in clean markdown format with headings for each question. Be thorough and exam-ready.