The pH gradient established by the electron transportchain in photosynthesis:
a.) Â Exists between the matrix and themitochondrial intermembrane space
b.) Â Sets up a voltage gradient that drives GTPformation
c.) Â Is established by electron transfer fromFADH2 and NADPH from the TCA
cycle to oxygen
d.) Â Occurs in part because Fe-S clusters canonly transport electrons and not protons
e.) Â None of the aboveÂ
