The major purpose of the electron transport system is to
A) reduce oxygen to water.
B) reoxidize NADH and use that energy to pump protons across a membrane.
C) produce ATP.
D) produce NADH for cellular respiration.

Question

Quizplus · Accepted Answer

The electron transport system (or electron transport chain) is responsible for reoxidizing NADH and using that energy to pump protons across a membrane, creating an electrochemical gradient. This gradient is then utilized by ATP synthase to produce ATP. The reduction of oxygen to water is one of the final steps in this process but is not the major purpose of the electron transport system.

The Major Purpose of the Electron Transport System Is to