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General Pharmacology

Drug Metabolism Practice Questions

20 free Drug Metabolism practice questions for the Pharmacology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Drug Metabolism questions

20 questions
  1. Q1. What is the primary goal of drug metabolism (biotransformation) in the body?
  2. Q2. Which of the following reactions is categorized as a Phase I metabolic reaction?
  3. Q3. The Cytochrome P450 (CYP) enzyme system is primarily located in which organelle of the hepatocyte?
  4. Q4. What is a 'Prodrug' in pharmacology?
  5. Q5. Which of the following is the most common Phase II conjugation reaction?
  6. Q6. How does 'Enzyme Induction' affect the metabolism of a co-administered drug that is a substrate for the same enzyme?
  7. Q7. Grapefruit juice is known to inhibit which specific CYP enzyme, leading to increased plasma levels of drugs like Statins and Felodipine?
  8. Q8. Which Phase I enzyme is responsible for the metabolism of roughly 25% of all clinical drugs and exhibits significant genetic polymorphism (e.g., poor vs. ultra…
  9. Q9. What is the primary role of Glutathione (GSH) in drug metabolism?
  10. Q10. In the metabolism of Acetaminophen (Paracetamol), which pathway becomes overloaded during an overdose, leading to hepatotoxicity?
  11. Q11. Which of the following is a non-microsomal metabolic reaction?
  12. Q12. The 'First-Pass Effect' refers to drug metabolism occurring in which two primary sites before the drug reaches systemic circulation?
  13. Q13. Which drug is a well-known 'Suicide Inhibitor' of the enzyme Xanthine Oxidase, used to treat gout?
  14. Q14. Phase II reactions are also known as 'Synthetic Reactions' because they involve:
  15. Q15. What is the clinical consequence of 'Slow Acetylator' status in a patient taking Isoniazid for tuberculosis?
  16. Q16. Which enzyme is responsible for the hydrolysis of the local anesthetic Procaine and the neuromuscular blocker Succinylcholine in the plasma?
  17. Q17. What happens during the 'De-alkylation' of a drug molecule?
  18. Q18. Biliary excretion of a drug metabolite can sometimes lead to 'Enterohepatic Recirculation'. This occurs when:
  19. Q19. The term 'Vmax' in enzyme kinetics refers to:
  20. Q20. Which factor is most likely to decrease hepatic drug metabolism in an elderly patient?