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why reduced FAD and reduced NAD are oxidised
to release electrons for the electron transport chain and H+ ions
what the energy produced from the electron transport chain is used for
to actively transport H+ ions across the inner mitochondrial membrane to the intermembrane space
why are H+ ions transported across the inner mitochondrial membrane
to create a proton gradient
how is ATP produced
H+ ions diffuse through ATP synthase which provides energy for the condensation reaction between ADP+ Pi
why oxygen is essential
oxygen acts as a final electron acceptor and combines with H+ and e- to make H20