Question

1. Out of the four membrane protein complexes involved in the electron transport chain, only [1] does NOT pump protons across the mitochondrial inner membrane.

a) Complex I

b) Complex II

c) Complex IV

2. One function of lactic acid fermentation is to ___________ so that glycolysis can continue in the absence of oxygen.

a) oxidize NADH to NAD+

b) reduce FAD to FADH2

c) oxidize FADH2 to FAD

3. The electron transport chain pumps protons into which intracellular compartment?

a) mitochondrial outer membrane

b) mitochondrial matrix

c) mitochondrial intermembrane space