Question

During blood coagulation, the conversion of inactive fibrinogen to fibrin threads and the conversion of prothrombin to thrombin are catalysed by:

• A. Both the reactions are catalysed by thrombin
• B. Both the reactions are catalysed by thrombokinase
• C. Thrombin and thrombokinase respectively
• D. Thrombokinase and thrombin respectively

Answer 1

The correct option is C Thrombin and thrombokinase respectively

Blood coagulation or blood clotting is the process, where the blood changes from its liquid form to a gel form or clot. Blood coagulation prevents excessive loss of blood from the body during tissue injury. Fibrinogen is a protein present in the blood plasma, it forms an insoluble clot on conversion to fibrin by the action of the enzyme thrombin. Thrombokinase is the enzyme which is responsible for the conversion of thrombin an inactive substance present in the plasma to prothrombin.

Hence the correct answer is option a.