Q.

Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins                [2021]

1 Thrombokinase  
2 Thrombin  
3 Renin  
4 Epinephrine  

Ans.

(2) 

Fibrins are formed by the conversion of inactive fibrinogen in the plasma by the enzyme thrombin and thrombins are formed from an another inactive substance present in plasma i.e., prothrombin.