Body Fluids and Circulation Question 83
83. Vitamin $K$ is required for
[1993]
(a) formation of thromboplastin
(b) conversion of fibrinogen to fibrin
(c) conversion of prothrombin to thrombin
(d) synthesis of prothrombin
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Answer : d
Hints & Solutions
(d) Synthesis of prothrombin helps in coagulation of blood. Vitamin $K$ is required for the synthesis of prothrombin and blood clotting factors I, VII, IX and X.