Zoology-Hormone Action Mechanism

NEET Zoology Hormone Action Mechanism MCQ Question

Type: MCQ-conceptual-Medium-Class 11

Which combination of statements correctly describes hormone action mechanisms?

A

Peptide hormones interact with membrane-bound receptors generating second messengers. 2. Steroid hormones usually enter the target cell and regulate gene expression.

B

All hormones can enter target cells regardless of their chemical nature. 2. Hormones that act through second messengers directly alter DNA.

C

Iodothyronines do not interact with intracellular receptors. 2. Glucocorticoids primarily cause changes in cellular metabolism without affecting gene expression.

D

Amino-acid derivative hormones only act on membrane-bound receptors. 2. Peptide hormones typically regulate gene expression directly.

Correct Answer

Option A

Detailed Explanation

Peptide hormones interact with membrane-bound receptors to generate second messengers, while steroid hormones typically enter the cell and regulate gene expression, as stated in the context provided.

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