Vitamins
A)are not sources of energy but are often associated with activity of important enzymes.
B)are chemicals which all animals can synthesize.
C)are chemicals which only humans need.
D)are the basic 20 amino acids which an animal cannot synthesize itself.
E)are considered sources of energy similar to carbohydrates and fats.

Question

Quizplus · Accepted Answer

Vitamins are not sources of energy, but they are essential organic compounds that are required by the body in small amounts for various metabolic processes. They act as coenzymes that help enzymes function properly, and without them, enzymes cannot perform their necessary functions. While some animals can synthesize certain vitamins, humans cannot and must obtain them from their diet.