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The correct answer is a. Glycolysis, which occurs in the cytoplasm of the cell, produces a net total of 2 ATPs (there are 4 total ATPs created, however 2 are needed for phosphorylations of glucose and fructose) and 2 NADHs. In the matrix, for every molecule of glucose (meaning two molecules of pyruvate, meaning two turns of the cycle), 2 ATPs, 2 FADH2s, and 6 NADHs are produced. Also CO2 is released in the Citric Acid Cycle upon the breakdown of citrate back to oxaloacetate.
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