Q109: Vitamin K is crucial for - Fish Biochemistry - Fish Physiology and Biochemistry- ICAR JRF/SRF 2024 | Agrigyan

• Vitamin K and Hemostasis:
• Vitamin K (phylloquinone / menaquinone) is a fat-soluble vitamin essential for blood clotting.
• It serves as an obligatory cofactor for the microsomal enzyme $\gamma$-glutamyl carboxylase.
• This enzyme catalyzes the post-translational carboxylation of specific glutamic acid residues into $\gamma$-carboxyglutamic acid (Gla) on blood coagulation factors:

• Gla residues coordinate $Ca^{2+}$ ions, enabling clotting factors to bind phospholipid surfaces and execute the coagulation cascade.
• nalysis:
• (Blood clotting): Correct.

Correct option: (2) Blood clotting