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Q.

Sodium-potassium pump is found in membranes of nerve cells. It works against electrochemical gradient. For each molecule of ATP used

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a

three ions of K+ are absorbed and three ions of Na+ are pumped out

b

two ions of Na+ are pumped out and three ions of K+ are absorbed

c

three ions of Na+ are pumped out and two ions of K+ are taken in

d

three ions of Na+ are taken in and two ions of K+ are pumped out

answer is C.

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Detailed Solution

During resting stage, Na+, K+ pump is operated by efflux of 3 Na+ and influx of 2 K+.

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