A) cause the release of energy to adjacent cells when energy is needed in aerobic conditions.
B) hasten the release of energy when the cell has been deprived of oxygen.
C) carry hydrogen atoms and free energy from compounds being oxidized,and to give hydrogen atoms and free energy to compounds being reduced.
D) block the release of energy to adjacent cells.
E) convert the potential energy of the proton gradient into the chemical energy in ATP.

A) It is a key electron carrier in redox reactions.
B) It requires oxygen to function.
C) It is found only in prokaryotes.
D) It binds with an acetyl group to form acetyl CoA.
E) It detoxifies hydrogen peroxide.

A) pyruvate oxidation.
B) glycolysis.
C) the citric acid cycle.
D) the respiratory chain.
E) gluconeogenesis.