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  • Assertion (A): Chemical messengers are chemicals that enable communication of message between two neutrons or between neurons and muscles. Reason (R): Chemicals enter the cell through receptor.

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choices:

(i) Assertion and reason both are correct statement but reason does not explain assertion.
(ii) Assertion and reason both are correct and reason explains the assertion.
(iii) Both assertion and reason are wrong statement.
(iv) Assertion is correct statement reason is wrong statement.
(v) Assertion is wrong statement reason is correct statement.

Assertion (A): Chemical messengers are chemicals that enable communication of message between two neutrons or between neurons and muscles.

Reason (R): Chemicals enter the cell through receptor.

 

Answers (1)

(iv) The chemical messengers communicate by attaching to the active site of enzymes on the cell membrane, but they cannot enter the cell through the receptors.

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Gurleen Kaur

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