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just as in photosynthesis, the flow of hydrogen ions is used to make ATP. hydrogen ions diffuse through a protein channel in the inner membrane of the mitochondria. the channel is part of the ATP synthase enzyme. ATP synthase adds phosphate groups to ADP to make ATP molecules. for each pair of electrons that passes through the electron transport chain, an average of three ATP molecules are made

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11y ago
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14y ago

Protons diffuse back from the intermembrane space into the mitochondrial matrix.

Submitted by ECSkye

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Q: What happens as ATP is synthesized in the electron transport chain?
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