Insulin controls the level of glucose in the blood. To which of the following categories does it belong?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A hormone
NCERT (2026-27 edition):
10.6 Hormones – “Hormones are molecules that act as intercellular messengers. … They help to maintain the balance of biological activities in the body. The role of insulin in keeping the blood glucose level within the narrow limit is an example of this function.”