BIOMOLECULES AND ENZYMES

Detailed explanation-1: -12. Which of the following vitamins serves as a hormone precursor? Sol: (c) Vitamin D.

Detailed explanation-2: -Vitamin D and cholesterol Vitamin D is linked to cholesterol because we need cholesterol in our skins cells to make vitamin D from sunlight. The vitamin D is later transformed again in the liver and kidneys, but cholesterol is needed for the first step.

Detailed explanation-3: -Abstract. Vitamins A and D are the first group of substances that have been reported to exhibit properties of skin hormones, such as organized metabolism, activation, inactivation, and elimination in specialized cells of the tissue, exertion of biological activity, and release in the circulation.