Poisons like cyanide inhibit Na+ efflux and K+ influx during cellular transport This inhibitory effect is reversed by an - Biology - Molecular Basis of Inheritance

Question

Poisons like cyanide inhibit Na+ efflux and K+ influx during
cellular transport This inhibitory effect is reversed by an
injection of ATP This demonstrates that:
Options:

a energy for Na+- K+ exchange pump comes from ATP
b Na+- K+ exchange pump operates in the cell
c ATP is hydrolyzed by ATPase to release energy
d ATP is the carrier protein in the transport system Explain in
detail

Anchit Kumari · Accepted Answer

Dear Student,

The correct answer is option (a) energy for
Na+-K+ exchange pump comes from ATP

Cyanide is an inhibitor of cytochrome c oxidase or complex IV of
electron transport chain Cytochrome c oxidase catalyses the
transfer of electrons from the reduced form of cytochrome c to
molecular oxygen Cyanide binds to the cytochrome c oxidase and
inhibits the terminal transfer of electrons to oxygen Thereby,
blocks the production of ATP Since the sodium-potassium pump
constantly requires the energy released by the hydrolysis of ATP to
work, but there is no 
ATP production by electron transport chain Therefore, the efflux of
sodium ions and influx of potassium ions is inhibited
An injection of ATP completes the
requirement of ATP and hence the energy Therefore, the inhibitory
effect of cyanide is reversed on the activity of
Na+-K+ pump

Regards