In stage II of clot formation,prothrombin is converted to:
A) fibrin.
B) fibrinogen.
C) thrombin.
D) thromboplastin.

Question

Quizplus · Accepted Answer

During stage II of clot formation, the enzyme thrombin is formed by the cleavage of prothrombin. Thrombin then catalyzes the conversion of soluble fibrinogen into insoluble fibrin, leading to the formation of the fibrin meshwork that constitutes the clot. Choice A (fibrin) and B (fibrinogen) are incorrect as they are substrates for thrombin or clotting factors, not products of its activity. Choice D (thromboplastin) is a clotting factor that initiates the coagulation cascade, but it is not directly involved in the conversion of prothrombin to thrombin.

In Stage II of Clot Formation,prothrombin Is Converted To