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Q.

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Ionic gradients across the resting membrane are maintained by sodiumpotassium
pump.

Reason (R) : Sodium -potassium pump operates by passive diffusion of sodium and potassium ions.

In light of the above statements, choose the correct answer from the option given below.

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a

(A) is true but (R) is false.

b

Both (A) and (R) are true and (R) is the correct explanation of (A).

c

Both (A) and (R) are false.

d

Both (A) and (R) are true but (R) is not the correct explanation of (A).

answer is C.

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Detailed Solution

(A) is true but (R) is false.

Ionic gradients across the resting membrane are maintained by sodium-potassium pump.

Sodium-potassium pump transports sodium and potassium ions actively.

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