Paper I
2025 March (Supplementary (SAY)) (2019 Scheme) · 100 marks · 180 min

Question

Assertion (A): Aspirin is used for its antiplatelet effects to prevent blood clots. Reason (R): Aspirin inhibits the enzyme cyclooxygenase (COX), which decreases thromboxane A2 production, a molecule that promotes platelet aggregation.

Assertion) Aspirin is used for its antiplatelet effects to prevent blood clots. Reason) Aspirin inhibits the enzyme cyclooxygenase (COX), which decreases thromboxane A2 production, a molecule that promotes platelet aggregation.

  • a) Both A and R are true, and R is the correct explanation of A
  • c) A is true but R is false
  • b) Both A and R are true, and R is not the correct explanation of A
  • d) A is false but R is true
Qxvi1 marksMCQs (A/R)

Answer

Correct answer: a) Both A and R are true, and R is the correct explanation of A

Both statements are true, and the Reason correctly explains the Assertion: aspirin irreversibly inhibits COX, reducing thromboxane A2 (a potent platelet-aggregating and vasoconstricting mediator), which underlies its antiplatelet effect.

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