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Answers. Best Answer: That is precisely what it requires as also denoted by the word oxidative phosphorylation. It happens through the electron transport chain process and the proton gradient it creates. Substrate level phosphorylation does not require oxygen, it occurs during glycolysis and the Krebs cycle.Source(s): greendawn Â· 7 years ago.t happens through the electron transport chain process and the proton gradient it creates. Substrate level phosphorylation does not require oxygen, it occurs during glycolysis and the Krebs cycle. Source(s): greendawn Â· 7 years ago.
The stoichiometry of electron transport and oxidative phosphorylation is 2.5 ATP per NADH and 1.5 ATP per FADH 2. As a result 9 ATP are generated by electron transport-oxidative phosphorylation per turn of the cycle. Molecular oxygen does not participate in the citric acid cycle.he principle signals are acetyl-CoA, succinyl-CoA, ATP,ADP, AMP, NAD + and NADH. All of the regulatory enzymes of the citric acid cycle including pyruvate dehyrogenase are allosterically inhibited by NADH.