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| Description: The third and final stage of aerobic respiration, electron transfer phosphorylation, occurs at the inner mitochondrial membrane. 1 NADH and FADH2 deliver electrons to electron transfer chains in the inner mitochondrial membrane. 2 Electron flow through the chains causes hydrogen ions (H+) to be pumped from the matrix to the intermembrane space. 3 The activity of the electron transfer chains causes a hydrogen ion gradient to form across the inner mitochondrial membrane. 4 Hydrogen ion flow back to the matrix through ATP synthases drives the formation of ATP from ADP and phosphate (Pi ). 5 Oxygen combines with electrons and hydrogen ions at the end of the electron transfer chains, so water forms. Picture Stats: Views: 174 Filesize: 210.4kB Height: 587 Width: 1700 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=49453 |