Answer:
carbon dioxide
Explanation:
At end of glycolysis, two pyruvate molecules are formed which contain lots of energy that can be extracted by further processes.
Oxidation of pyruvate converts pyruvate which is a molecule with three carbons into acetyl CoA which is a two-carbon molecule which is attached to Coenzyme with the production of NADH and one carbon dioxide molecule is released in the oxidation process.
Acetyl CoA further acts as a fuel for citric acid cycle in next stage of cellular respiration.
Pyruvate + Coenzyme A + NAD⁺ ⇒ acetyl CoA + CO₂ + NADH + H⁺
