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Question

Assertion: Receptor proteins show selectivity for one chemical messenger over the other.

Reason: Chemical messenger binds to the receptor site and inhibits its natural function.

A
Both assertion and reason are wrong statements
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B
Assertion is correct statement reason is wrong statement
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C
Assertion and reason both are correct statements, but reason does not explain assertion
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D
Assertion is wrong statement reason is correct statement
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E
Assertion and reason both are correct, and reason explains the assertion
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Solution

The correct option is B Assertion is correct statement reason is wrong statement
Assertion

Receptors which are basically proteins show selectivity for a certain chemical messenger due to the variety of shapes, structures and even their amino acid compositions. So different receptors interact with different types of chemical messengers.

So, assertion is correct.

Reason

Chemical messengers process communication between cells only and do not pay any contribution to inhibition of any natural functions of the receptors.
So, reason is wrong statement.

Hence, assertion is correct statement reason is wrong statement.


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