-This also occurs in the matrix of the mitochondria
1. NADH & FADH donate electrons to get the ETC started, protons are also released during this
2.The electrons travel down the electron transport chain losing energy as they go, this energy is used to make ATP from ADP + Pi
3.Meanwhile the protons are actively transported into the space between the membranes of the mitochondria, where they build up
4. The protons are then allowed to diffuse back into the matrix, where they combine with oxygen and the electrons to make water
(Oxygen is the final electron acceptor in the electron transport chain)
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