Home Biology Chemical Co-ordination and Integration NCERT Examplar In the mechanism of action of a protein horm…
Biology Chemical Co-ordination and Integration NCERT Examplar Single Correct MCQ
Published on: August 21, 2026

In the mechanism of action of a protein hormone, one of the second messengers is:

A
Cyclic AMP
B
Insulin
C
D
Gastrin

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The correct answer is:

                    

Cyclic AMP is one of the second messengers involved in the action of a protein hormone. The other three options are incorrect as insulin regulates glucose homeostasis.
regulates the metabolic rate of the body and thus, helps in maintaining Basal Metabolic Rate (BMR). Gastrin is a peptide hormone that stimulates the secretion of hydrochloric acid and pepsinogen.

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