How many protons are translocated across the inner mitochondrial membrane by complex IV for every pair of electrons passing through the electron transport chain?
A)0
B)1
C)2
D)3
E)4

Question

Quizplus · Accepted Answer

Complex IV, also called cytochrome c oxidase, moves two protons (2H+) across the inner mitochondrial membrane for every pair of electrons passing through the electron transport chain. Therefore, the correct answer is C (two protons).

How Many Protons Are Translocated Across the Inner Mitochondrial Membrane