Which of the following proteins catalyses the polymerization of fibrinogen into fibrin?
A
Albumin
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B
Globulin
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C
Thrombin
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D
Thromboplastin
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Solution
The correct option is C Thrombin Thrombin catalyses the polymerization of fibrinogen into long chains of fibrin. Albumin helps in maintaining the osmotic balance of blood and prevents the water from diffusing out of the blood stream. Globulins include the immunoglobulins whose primary function is to provide a defence mechanism to the body. Thromboplastin is released by thrombocytes (platelets) which initiate clotting wherever there is damage in the blood vessel.