Pyruvate when enters into mitochondrial matrix, it undergoes oxidative decarboxylation by a complex set of reactions catalysed by pyruvic dehydrogenase.
Glycolysis often referred to as the EMP pathway.
rOxidative phosphorylation in process embedded in inner membrane of mitochondria (called electron transport chain and ATP synthase). The reaction in TCA cycle catalysed by the enzyme citrate synthase.

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