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Unformatted text preview: without the use of the electron transport system in the mitochondria. The net yield of ATP in glycolysis is 2 for each glucose molecule (2 are used but 4 are produced). Some bacteria have alternative energy-producing reactions. Two of these are the pentose phosphate pathway and the Entner-Doudoroff pathway. Formation of Acetyl CoA Pyruvate produced by glycolysis (see above) enters the mitochondrion and is converted to acetyl CoA by the reaction below. The remainder of the reactions of cellular respiration occur in the mitochondrion . pyruvate (C 3 ) → acetyl CoA (C 2 ) + CO 2 During this step, NADH is produced from NAD + + 2H (oxidation). This step must occur twice for each glucose molecule because each glucose molecule produces two pyruvate molecules in glycolysis (above). The two-carbon compound produced is attached to Coenzyme A to produce acetyl CoA....
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