So we ultimately use the NADH molecules and the fadh, two molecules produced in glycolysis and the citric acid cycle, to actually generate those high energy ATP molecules. And this takes place in the electron transport chain. So the culmination of aerobic cell respiration is oxidative aspiration along the proteins of the electron transport chain. So the NADH molecules form in glycolysis, which takes place in a cytoplasm. And the NADH and the fadh, two molecules formed in the citric acid cycle, which takes place in the matrix of the mitochondria, are basically used to ultimately reduce diatomic oxygen molecules to form water, in the process also generating high energy ATP molecules. And this is shown summarized in the following diagram.