1
Question
Assertion :
Hormones interacting
with cell surface receptors do not enter the target but they generate
second messenger.
Reason:
Glucocorticoids bind
to intracellular receptors and regulate gene expression.
Assertion :
Hormones interacting with cell surface receptors do not enter the target but they generate second messenger.
Reason:Glucocorticoids bind to intracellular receptors and regulate gene expression.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The hormones which interact with cell surface receptors are peptide hormones. They do not enter the target cells but generate a second messenger such as cAMP (cyclic adenosine monophosphate) which delivers information inside the target cells. Hence assertion is true.Glucocorticoids are steroid hormones which can cross the lipid bilayer and enter the target cell where they bind to receptors and induce transcription of genes. Thus, steroid hormones act by regulating gene expression. Hence reason is also true but is not correct explanation for assertion.So, the correct answer is 'Both A and R are true but R is not correct explanation of A'.
The hormones which interact with cell surface receptors are peptide hormones. They do not enter the target cells but generate a second messenger such as cAMP (cyclic adenosine monophosphate) which delivers information inside the target cells. Hence assertion is true.
Glucocorticoids are steroid hormones which can cross the lipid bilayer and enter the target cell where they bind to receptors and induce transcription of genes. Thus, steroid hormones act by regulating gene expression. Hence reason is also true but is not correct explanation for assertion.
So, the correct answer is 'Both A and R are true but R is not correct explanation of A'.
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