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JEE Main · 2021 · 18 Mar 2021 · Shift 2 · Biomolecules

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Deficiency of vitamin K causes:
  1. (A)Cheilosis
  2. (B)Increase in blood clotting time✓ Correct
  3. (C)Decrease in blood clotting time
  4. (D)Increase in fragility of RBC's

Answer: (B)

Solution

Vitamin K is the cofactor for the carboxylation reaction in the liver that converts prothrombin and factors VII, IX and X into their active forms. Without it these clotting factors remain inactive, the clotting cascade runs slowly and bleeding continues longer than it should. Deficiency of vitamin K causes an increase in blood clotting time.

JEE Main · 2021 · 18 Mar 2021 · Shift 2 · Single correct option

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