Question

Which of these is/are inactive forms
(i) Fibrin (ii) Fibrinogen (iii) Thrombin (iv) Prothrombin (v) Thrombokinase

• A. v only
• B. i and iii only
• C. i and ii only
• D. iii and v only
• E. ii and iv only.

Answer 1

The correct option is E ii and iv only.

Prothombin protein flows in blood stream as an inactive from until an injury occurs in body that damages blood vessels. In response to injury, prothombin is converted to its active from thrombin.

Fibrinogen is a soluble protein, produced by the liver and found in blood plasma, is also an inactive form until tissue damage resulting in bleeding. In response to bleeding, fibrinogen is converted at the wound into fibrin by the action of thrombin.

So the correct answer will be option E.