Question

Select the correct option for given reaction occurs during blood clotting–

$\text{(i)}$ → Thrombin → Fibrin

$\text{(ii)}$ → Prothrombin → Thrombin

• A. $\text{i –}$ Fibrinogen, $\text{ii–}$ Thrombokinase
• B. $\text{i–}$Collagen, $\text{ii–}$Phosphatases
• C. $\text{i–}$Fibrinogen, $\text{ii–}$Thrombokinase
• D. $\text{i-}$ Plasmin, ${\text{ii–Ca}}^{2+}$

Answer 1

The correct option is C $\text{i–}$Fibrinogen, $\text{ii–}$Thrombokinase

Fibrins are formed by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin by an enzyme complex known as thrombokinase. Calcium ions play a very important role in clotting.

So, the correct answer is option 'c'.