Published by:
CGP EDU Academic Team
Published on: August 21, 2026
pump is found in membrane of many cells, like nerve cells. It works against electro - chemical gradient and involve an integral protein ATPase. For each molecule of ATP used;
A
three ion of 
and two 
are taken in
and two are taken in B
three ions of 
are taken in and three 
are pumped out
are taken in and three are pumped out C
two ions of 
are thrown out and three 
are absorbed
are thrown out and three are absorbed D
two ions of 
are pumped in and three 
are pumped out
are pumped in and three are pumped out
Text Solution
Verified by ExpertsThe correct answer is:
D
pump is an active transport pump ( 
ATPase) that restores the resting membrane potential across the neurons.
• It works against electrochemical gradient.
• For each molecule of ATP hydrolyzed:
ions are pumped out of the cell.
ions are pumped in.
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