Answer :

In the conversion of pyruvate to acetyl-CoA, each pyruvate molecule loses a carbon atom with the release of carbon dioxide. During the decomposition of pyruvate, an electron is transferred to NAD+ to produce NADH. It is used by cells to generate ATP.

Citric Acid Cycle

In mitochondria, pyruvate is converted to a two-carbon acetyl group (by removing the carbon dioxide molecule) and taken up by a carrier compound called coenzyme A (CoA). From vitamin B5. The resulting compound is called acetyl-CoA. The enzyme rearranges the atoms of the citric acid molecule (6 carbons) to a new 6 carbon configuration. Energy is released when a six-carbon array is oxidized and one carbon is removed. Carbon molecules removed combine with oxygen to produce CO2.

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