Zoology-Hormone Action Mechanism

NEET Zoology Hormone Action Mechanism MCQ Question

Type: MCQ-conceptual-Medium-Class 11

Which of the following statements about hormone action mechanisms is correct?

A

Peptide hormones generate second messengers and usually do not enter the target cell.

B

Steroid hormones require second messengers to exert their effects on target cells.

C

All hormones act exclusively through intracellular receptors.

D

Hormones that interact with membrane-bound receptors can directly alter gene expression.

Correct Answer

Option A

Detailed Explanation

Peptide hormones, such as insulin, typically bind to membrane-bound receptors and generate second messengers like cyclic AMP, while steroid hormones usually enter the cell and regulate gene expression directly.

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