Question

Which of the following is a precursor of vitamins and steroid hormones
A. Lipids
B. Cholesterol
C. Lipoic acid
D. None of the above

Answer 1

Hint: Vitamins are organic molecules that are necessary for normal metabolism in animals, but either are not synthesized in the body or are synthesized in small quantities.

Complete step by step answer:
-Cholesterol acts as a precursor of Vitamins steroid hormones like estrogen, testosterone.
Synthesis of cholesterol from acetyl-CoA takes place in the liver. Cholesterol is an essential metabolite for the normal functioning of the endocrine system, regulation of cell membrane processes, and absorption of dietary lipids. They are important structural components of membranes.
-Cholesterol also works as a precursor for the synthesis of steroid hormones, vitamin D, and bile salts which are important in fat absorption from the small intestine into the blood circulatory system and secretion of liver waste products through excretion.
-Cholesterol is also the precursor to bile salts, which help in the emulsification of fats and their absorption by cells. Hence, Lipids is responsible for steroid production.
-The steroid hormones are synthesized in the adrenal cortex, the gonads, and the placenta; are all derived from cholesterol and many are of clinical importance. Steroid hormones are synthesized in the mitochondria and smooth endoplasmic reticulum.

So the correct option is B.

Note:
1. Lipids perform three primary functions within the body: they serve as structural components of cell membranes, function as energy storehouses, and function as important signaling molecules.
2. Lipoic acid seems to help prevent certain kinds of cell damage in the body, and also restores vitamin levels such as vitamin E and vitamin C. Alpha-lipoic acid can improve the function and conduction of neurons in diabetes.