The product formed by the removal of a carbon (as CO₂) from a molecule of pyruvate is (B) acetyl CoA.
Pyruvate is a three carbon molecule formed by the breakdown reaction of glucose in the glycolysis process. It is the end product of glycolysis. Pyruvate is the simplest alpha-keto acid. Pyruvate acts as a carbon transporter to the mitochondria for the process of cellular respiration.
Acetyl CoA is the product formed by the oxidative decarboxylation of the pyruvate. This process occurs after the glycolysis, in the matrix of mitochondrion. It is also known as linking reaction, because it acts as a link between the glycolysis and the TCA cycle.
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