Vitamins

Question

Vitamins

Quizplus · Accepted Answer

Vitamins are organic compounds that are essential in small amounts for normal physiological functioning. They are typically not synthesized by the body and must be obtained from the diet or supplements. Many vitamins act as precursors of coenzymes, which are necessary for enzymatic reactions involved in metabolism. However, vitamins are required only in small amounts for metabolism, so choice C is incorrect. Choice B is also incorrect, as vitamins are not typically synthesized by the body from precursor subunits, although some can be synthesized in limited amounts. Therefore, the best choice is A, which correctly states that vitamins may be precursors of coenzymes.