Which of these processes results in depletion of protons inthe matrix and buildup of protons in the intermembrane space of the mitochondrion?
a.) Oxidation of NAD+ by FMN and subsequent reduction of theFe-S cluster of complex I.
b.) Oxidation of FMNH2 by the Fe-S cluster in complex I.
c.) Formation of water in the intermembrane space
d.) Oxidation of FADH2 by the Fe-S cluster in complex II
e.) none of these contribute to the pH gradient.