Question 9
What are vitamins, and what do they do?
The right answer is the one marked above.
Vitamins are organic compounds. They take part in the biochemical reactions that happen inside the body, and they are important for maintaining good health.
They are not an energy source — that is carbohydrate, lipid, and protein at a push. Like mineral salts, vitamins are needed in small amounts, and their absence shows in the deficiency symptoms rather than in hunger.