Question

Conversion of fibrinogen to fibrin is catalysed by

• A. Prothrombin
• B. Thromboplastin
• C. Thrombin
• D. All of the above

Answer 1

The correct option is C Thrombin

The mechanism of blood clotting is as follows:

• Whenever there is a rupture of vessels or damage is caused to the blood, 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 convert fibrinogen into fibrin threads which form clot at the wound site.

So, the correct answer is 'Thrombin'.