Biochemistry & Clinical Pathology for D.Pharmacy Year 2

Biochemistry & Clinical Pathology (ER20-23T) bridges the gap between basic science and clinical pharmacy practice.

Important Topics in Biochemistry

1. Carbohydrate Metabolism

Glycolysis (Glucose → Pyruvate)

  • Occurs in cytoplasm
  • 10-step pathway
  • Produces 2 ATP (net)
  • Key enzymes: Hexokinase, Phosphofructokinase, Pyruvate kinase

    • Krebs Cycle (TCA Cycle)

  • Occurs in mitochondria
  • Produces 2 ATP + NADH + FADH2
  • Key intermediates: Citrate, Isocitrate, α-Ketoglutarate, Succinate

    • Diabetes Mellitus (Key for clinical pharmacy)

  • Type 1: Insulin deficiency
  • Type 2: Insulin resistance
  • Lab markers: Fasting blood glucose, HbA1c, OGTT

    • 2. Protein Metabolism

    Amino Acid Catabolism

  • Transamination
  • Deamination
  • Urea cycle (liver)

    • Important Clinical: Liver Function Tests

  • ALT (SGPT): Liver damage marker
  • AST (SGOT): Liver and muscle damage
  • Alkaline Phosphatase: Biliary obstruction
  • Bilirubin: Jaundice marker

    • 3. Lipid Metabolism

    Lipoproteins (Clinical Importance)

  • LDL: "Bad" cholesterol (atherosclerosis)
  • HDL: "Good" cholesterol (cardioprotective)
  • VLDL: Triglyceride transport

    • Ketone Bodies

  • Formed when fat is metabolized excessively
  • Diabetic ketoacidosis marker

    • Clinical Pathology: Laboratory Tests

    Hematology Tests

    TestNormal RangeClinical Significance |------|-------------|----------------------| HemoglobinM: 13–17 g/dL, F: 12–16 g/dLAnemia assessment WBC Count4,000–11,000/μLInfection/immunity Platelet Count1.5–4.5 Lakh/μLBleeding disorders ESRM: 0–15, F: 0–20 mm/hrInflammation marker

    Biochemistry Tests

    TestNormal ValueDisease Indicated |------|-------------|------------------| Fasting Blood Glucose70–100 mg/dLDiabetes if >126 HbA1c<5.7%Diabetes control Serum Creatinine0.6–1.2 mg/dLKidney function Serum Urea (BUN)7–20 mg/dLKidney function Total Cholesterol<200 mg/dLCardiovascular risk

    Exam Tips

  • Know normal values — MCQs often test these
  • Understand which test indicates which disease
  • Learn glycolysis and Krebs cycle with key enzymes
  • Clinical pathology linking is high-scoring

    • FAQ

    Q: Is biochemistry difficult in D.Pharmacy? A: Manageable if you focus on clinical correlations. Don't memorize every pathway — understand the logic.

    Q: What is HbA1c? A: Glycated hemoglobin — reflects average blood glucose over past 2–3 months. Used to monitor diabetes control.

    Q: What does elevated ALT indicate? A: Liver damage (hepatitis, drug toxicity). ALT is more specific for liver than AST.

    Q: What is the normal fasting blood glucose? A: 70–100 mg/dL. 100–125 mg/dL = pre-diabetic. >126 mg/dL on two tests = diabetic.

    Q: What is LDL vs HDL? A: LDL carries cholesterol to tissues (bad, causes plaques). HDL removes cholesterol from tissues (good, protective).