Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Thrombin is an active enzyme that converts inactive fibrinogens in the plasma into fibrins. Reason (R): The coagulum formed at the site of an injury is mainly composed of a network of thrombin threads. In the light of the above statements, choose the most appropriate answer from the options given b

Step-by-step solution

Assertion (A) is a true statement. During blood coagulation, thrombin acts as the active enzyme that catalyzes the conversion of inactive soluble fibrinogens present in the plasma into insoluble fibrins. Reason (R) is a false statement. The dark reddish-brown scum or coagulum formed at the site of an injury is mainly composed of a network of fibrin threads, not thrombin threads. Thrombin is merely the enzyme that facilitates their formation. Therefore, Assertion (A) is true but Reason (R) is false. Answer: Assertio