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At which stage of cellular respiration is the most ATP produced?

A:

Quick Answer

The stage of cellular transportation at which the most ATP is produced is during the electron transport chain. This stage produces a total of 32 ATP molecules for every glucose, according to the Indiana University Purdue University Indianapolis Department of Biology.

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Full Answer

Three of the four stages of cellular respiration produce ATP. The first stage, glycolysis, occurs in the cytoplasm of the cell. During this stage, one glucose molecule is broken into two pyruvic acid molecules. This results in the production of two ATP molecules for every glucose used.

The pyruvic acid is taken to the mitochondria during the transition reaction, which is the second stage of cellular respiration. The pyruvic acid is then converted to acetyl CoA. During the Krebs cycle, which occurs in the mitochondrial matrix, all the hydrogen atoms are taken from the acetyl CoA. Four ATP molecules are produced during the Krebs cycle.

The final step of cellular respiration is the electron transport chain. The NADH produced during the Krebs cycle carries the electrons from hydrogen down the electron transport chain.

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