Question

The contribution made by electric potential versus pH gradient to the proton motive force (Δp) is determined by which property of the mitochondrial membrane?

(a) thickness

(b) position in the cell

(c) permeability

(d) number of cristae

This question was posed to me in examination.

The above asked question is from Aerobic Respiration topic in chapter Nucleus & Aerobic Respiration of Cell Biology

Answer 1

Correct option is (c) permeability

To explain: The contribution made by electric potential versus pH gradient is determined by the permeability of the membrane. For example if at a particular instance, membrane is permeable to Cl- ions the electric potential gradient is reduced without affecting the proton gradient.