Question

In blood clotting, __________ converts the inactive fibrinogen to insoluble fibrin.

• A. thrombin
• B. creatine kinase
• C. heparin
• D. thrombokinase

Answer 1

The correct option is A thrombin

The mechanism of blood clotting begins when there is a rupture or damage of blood vessels, a complex of substances called prothrombin activator complex is formed.

This activator complex catalyse the conversion of prothrombin into thrombin. Thrombin acts as an enzyme and converts fibrinogen into fibrin threads which form clot at the wound site.