1.

Assertion (A) : Chemical messenger gives message to the cell without entering the cell. Reason (R) : Chemical messenger is received at the binding site of receptor proteins.

Answer»

Assertion and REASON both are CORRECT statement but reason does not EXPLAIN assertion. 
Assertion and reason both are correct and reason EXPLAINS the assertion. 
Both assertion and reason are WRONG statement.
Assertion is correct statement reason is wrong statement.

Solution :Assertion and reason both are correct and reason explains the assertion.


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