A proton pump is needed in the lysosomal membrane because:
A)the interior of the lysosome needs to be acidic.
B)protons are being moved from low to high concentration.
C)protons cannot move across a membrane on their own.
D)All of these choices are correct.

Question

Quizplus · Accepted Answer

The proton pump in the lysosomal membrane is needed to maintain the acidic pH of the lysosome, which is necessary for proper degradation of cellular waste and pathogens. The pump moves protons from the cytoplasm into the lysosomal lumen against their concentration gradient, which requires energy. Protons cannot move across a membrane on their own due to their charge, so a pump is necessary. Therefore, all three choices are correct.

A Proton Pump Is Needed in the Lysosomal Membrane Because