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Test: Mechanism of Hormone Action - NEET MCQ


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5 Questions MCQ Test Biology Class 11 - Test: Mechanism of Hormone Action

Test: Mechanism of Hormone Action for NEET 2024 is part of Biology Class 11 preparation. The Test: Mechanism of Hormone Action questions and answers have been prepared according to the NEET exam syllabus.The Test: Mechanism of Hormone Action MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Mechanism of Hormone Action below.
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Test: Mechanism of Hormone Action - Question 1

The signal transduction of steroid hormone across cell is through

Detailed Solution for Test: Mechanism of Hormone Action - Question 1

Steroid hormones, being hydrophobic molecules, diffuse freely into all cells and act within the cell. Steroid hormones enter the cytoplasm of a target cell and bind with specific receptor proteins (mobile). Hormone-receptor complex then diffuses into nucleus and activates specific genes to form a new protein. This protein carries out the specific response for a particular steroid hormone.

Test: Mechanism of Hormone Action - Question 2

According to the accepted concept of hormone action, if receptor molecules are removed from target organs, then the target organ will

Detailed Solution for Test: Mechanism of Hormone Action - Question 2

Hormones recognise target organs by the presence of specific receptor molecules on the plasma membrane of target organs, if these receptor molecules are removed then a hormone will be unable to give any response.

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Test: Mechanism of Hormone Action - Question 3

Which one of the following hormones never reaches to cytoplasm?

Detailed Solution for Test: Mechanism of Hormone Action - Question 3

FSH  is a proteinaceous hormone. It does not enter its target cells, thus, it never reaches to cytoplasm. Instead, it binds to the receptor present on the cell membrane and activates a membrane bound enzyme that causes conversion of ATP to cAMP. This then alters the activities of enzymes in the cytoplasm.

Test: Mechanism of Hormone Action - Question 4

Estrogen and testosterone are steroid hormones, and are most likely bind to

Detailed Solution for Test: Mechanism of Hormone Action - Question 4

Estrogen and testosterone being steroid hormones are soluble in lipids, therefore they can cross the plasma membrane and bind to the cytoplasmic receptors to trigger their action.

Test: Mechanism of Hormone Action - Question 5

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?

Detailed Solution for Test: Mechanism of Hormone Action - Question 5

Cortisol and testosterone are steroid hormones and are easily soluble in lipids. They regulate gene expression by the interaction of hormone receptor complex with the genome. So, these easily pass through the cell membrane of the target cell and bind to a receptor inside it.

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