Question

Given below are two statements.
Statement I - Prothrombinase converts inactive prothrombin into active thrombin.
Statement II - Thrombin converts insoluble fibrinogen into soluble fibrin.
In the light of above statements, select the correct option given below:

• A. Both statement I and statement II are correct
• B. Both statement I and statement II are incorrect
• C. Statement I is correct but statement II is incorrect
• D. Statement I is incorrect but statement II is correct

Hint:

Recall which clotting protein is soluble and which is insoluble.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept
Blood clotting is a cascade ending in a fibrin mesh.

Step 2: Statement I
Prothrombinase converts inactive prothrombin into active thrombin, so this statement is correct.

Step 3: Statement II
Thrombin converts soluble fibrinogen into insoluble fibrin threads. The statement reverses the solubility, so it is incorrect.

Final Answer:
Statement I is correct and Statement II is incorrect. \[ \boxed{\text{(C) }\text{Statement I is correct but statement II is incorrect}} \]