True or false: The two primary functions of the electron-transport chain (including oxidative phosphorylation) are to produce water and to convert ATP to ADP. Explain.

False, one of the main functions is the oxidation of NADH and FADH₂, not the production of water, and ADP is converted to ATP, not the other way around.

False, although ATP is converted to ADP to produce energy, the other main function is the oxidation of NADH and FADH₂, not the production of water.

False, although the production of water is one of the main functions, ADP is converted to ATP, not the other way around.

True, because the production of water is an important energy modulator and ATP is converted to ADP to produce energy.