Before entering into Krebs cycle, the pyruvate is first decarboxylated and oxidized into:

Explanation

Before entering the Krebs cycle, pyruvate is first decarboxylated and oxidized into acetyl-CoA. Acetyl-CoA is a two-carbon molecule that is the starting point for the Krebs cycle.The decarboxylation of pyruvate is a reaction that removes a carbon dioxide molecule from pyruvate. This reaction is catalyzed by the pyruvate dehydrogenase complex, which is an enzyme complex that is found in the mitochondrial matrix.The oxidation of pyruvate is a reaction that removes two electrons from pyruvate. These electrons are transferred to NAD+, which is reduced to NADH.