What is the effect of proton accumulation in the intermembrane space?

Where is NADH oxidized in electron transport, and what is its oxidized form?

FADH₂ can be oxidized at both complex I and II in the inner membrane of mitochondria. (T/F)

Write a reaction representing oxidation of NADH coenzyme.

The mobile electron carriers of the ETC are:

What atom in the cytochromes undergoes oxidation and reduction in the electron-transport chain? What atoms in coenzyme Q undergo oxidation and reduction in the electron-transport chain?

What two coenzymes are involved with initial events of the electron-transport chain?

What happens to the energy level as electrons are passed along in electron transport?