How many ATP are used and made in glycolysis, the Krebs cycle and the electron transport chain?

In kreb cycle, pyruvic acid is break down in to carbon dioxide. This produces 2 ATP and 6 NADH , for every glucose molecule entering glycolysis. In electron transport chain most of the energy ( 34 ATP molecules, compared to only 2 ATP for glycolysis and 2 ATP for Krebs cycle). The electron transport chain takes place in the mitochondria. This stage converts the NADH into ATP. Glucose ( 6 carbon atoms) is split into 2 molecules of pyruvic acid (3 carbons each) in glycolysis. This produces 2 ATP and 2 NADH.

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