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Poisons like cyanide inhibit Na^(+) infl...

Poisons like cyanide inhibit `Na^(+)` influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that

A

`Na^(+) - K^(+)` pump operates fully in cells

B

ATP is hydrolysed by ATPase to release energy

C

Energy for `Na^(+)- K^(+)` pump comes from ATP hydrolysis

D

ATP is a carrier protein

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The correct Answer is:
C
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[A] : Poisons like cyanide inhibit Na^+ efflux and K^+ influx during cellular transport. ATP supply required for the Na^+ and K^+ exchange pump is stopped.

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Na^+ - K^+ pump is found in membranes of many cells like nerve cells. It works against electrochemical gradient and involves an integral protein ATPase. At the cost of one ATP, ionic gradient across the resting member is maintained by Na^+ - K^+ pump by transporting