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pres.layout = "LAYOUT_16x9";
pres.title = "Carbohydrates MCQ - First Year Biochemistry";

// ─── THEME ───────────────────────────────────────────────────────────────────
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// ─── SLIDE 1 — TITLE ─────────────────────────────────────────────────────────
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// ─── HELPER: build a question slide ─────────────────────────────────────────
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// ─── HELPER: build an answer key slide ──────────────────────────────────────
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// ═══════════════════════════════════════════════════════════════════════════════
// MCQ DATA
// ═══════════════════════════════════════════════════════════════════════════════

const questions = [
  {
    q: "Q1. Which of the following is the PRIMARY storage form of glucose in the human body?",
    opts: ["Starch", "Glycogen", "Cellulose", "Sucrose"],
    correct: 1, // B
    short: "Primary storage form of glucose in the human body?",
    explanation:
      "Glycogen is the body's storage form of glucose, found mainly in liver and skeletal muscle. It is a branched polysaccharide structurally similar to starch (the plant storage form). During fasting, liver glycogen is broken down (glycogenolysis) to maintain blood glucose levels.\n\n" +
      "— Basic Medical Biochemistry (6e), Fig. 1.4"
  },
  {
    q: "Q2. Sucrose is hydrolyzed in the intestinal brush border into which two monosaccharides?",
    opts: ["Glucose + Galactose", "Glucose + Fructose", "Galactose + Fructose", "Glucose + Glucose"],
    correct: 1, // B
    short: "Products of sucrose hydrolysis by intestinal sucrase?",
    explanation:
      "Sucrose (table sugar) is a disaccharide cleaved by sucrase into glucose and fructose. By contrast, lactose is cleaved by lactase into glucose + galactose, and maltose is cleaved by maltase into two glucose molecules.\n\n" +
      "— Costanzo Physiology (7e), Chapter 8; Basic Medical Biochemistry (6e)"
  },
  {
    q: "Q3. The committed (rate-limiting) step of glycolysis is catalyzed by which enzyme?",
    opts: ["Hexokinase", "Pyruvate kinase", "Phosphofructokinase-1 (PFK-1)", "Phosphoglucose isomerase"],
    correct: 2, // C
    short: "Which enzyme catalyzes the committed step of glycolysis?",
    explanation:
      "Phosphofructokinase-1 (PFK-1) converts fructose-6-phosphate to fructose-1,6-bisphosphate and is the committed, rate-limiting step of glycolysis. It is allosterically inhibited by ATP and citrate (high energy state) and activated by AMP and fructose-2,6-bisphosphate.\n\n" +
      "— Basic Medical Biochemistry (6e), Chapter 22; Harper's Illustrated Biochemistry (32e)"
  },
  {
    q: "Q4. Which monosaccharide is transported across the intestinal apical membrane by FACILITATED DIFFUSION (not sodium-coupled transport)?",
    opts: ["Glucose", "Galactose", "Fructose", "Mannose"],
    correct: 2, // C
    short: "Which monosaccharide uses facilitated diffusion (not Na⁺-coupled) for intestinal absorption?",
    explanation:
      "Fructose crosses the intestinal apical membrane via GLUT5 by facilitated diffusion, independent of sodium. Glucose and galactose are absorbed via SGLT1, a sodium-dependent cotransporter. This distinction is clinically relevant in glucose-galactose malabsorption syndrome.\n\n" +
      "— Medical Physiology (Boron & Boulpaep), Box 45-2; Costanzo Physiology (7e)"
  },
  {
    q: "Q5. How many kilocalories of energy are yielded per gram of carbohydrate when completely oxidized in the body?",
    opts: ["2 kcal/g", "4 kcal/g", "7 kcal/g", "9 kcal/g"],
    correct: 1, // B
    short: "Caloric yield per gram of carbohydrate completely oxidized?",
    explanation:
      "Carbohydrates yield approximately 4 kcal/g upon complete oxidation to CO₂ and H₂O. This is the same caloric density as proteins (4 kcal/g). Fats yield 9 kcal/g and alcohol 7 kcal/g. Carbohydrates are already partially oxidized due to their oxygen content, hence their lower caloric density compared to fats.\n\n" +
      "— Basic Medical Biochemistry (6e), Table 1.1"
  }
];

// ─── BUILD SLIDES ─────────────────────────────────────────────────────────────
const labels = ["A", "B", "C", "D"];

// Question slides
questions.forEach((q, i) => {
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});

// Separator slide before answer key
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});

// ─── WRITE FILE ───────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/carbohydrates-mcq/Carbohydrates_MCQ_Biochemistry.pptx" })
  .then(() => console.log("Done: Carbohydrates_MCQ_Biochemistry.pptx"))
  .catch(e => { console.error(e); process.exit(1); });

Successfully replaced 1 instance(s) of the string in '/home/daytona/workspace/carbohydrates-mcq/create_pptx.js'