Question

Which fat-soluble vitamin is necessary for blood coating?
(a) A
(b) D
(c) E
(d) K

Answer 1

The fat- soluble vitamin that is necessary for blood coating is synthesized by the colonies of bacteria located in our intestines. They also help in fulfilling the dietary requirements of this vitamin along with many external sources like green leafy vegetables.

Complete step by step answer:
Vitamins are organic compounds required by the body in trace amounts to perform a specific cellular function. They can be classified according to their solubility in water or fats. Four vitamins A, D, E, K are termed fat- soluble. Vitamin K participates in the post- translational modification of several blood- clotting factors like prothrombin. It helps in the activation of proenzymes in the cascade of blood coagulation reactions and transforms them into a biologically activated enzyme.
- Vitamin A or retinol is essential for vision, reproduction, and growth as well as maintenance of epithelial tissues. Oxidation of retinol to retinal initiates the response of rods and cones to light.
- Vitamin D serves an important function in the body as a steroid hormone precursor used by the kidneys to synthesize calcitriol. It helps in the regulation and metabolism of calcium and phosphate.
- The primary function of Vitamin E is as an antioxidant by preventing non- enzymatic oxidation of cell components by some harmful byproducts of molecular reactions like free radicals.
- As fat-soluble vitamins can not dissolve in the water medium of blood, they are carried and transported all over the body by special lipoproteins. Due to their solubility in fats, they can be stored in the fatty tissue and liver for future use.
So, the correct answer is ‘(d) Vitamin K.’

Note: The water-soluble vitamins can be easily absorbed in the body as well as quickly metabolized in chemical reactions but they can not be stored in the body for future use. For this reason, they need to be administered daily in our diet to maintain their effective concentrations in our bodies. E.g. Vitamin B complex and Vitamin C.