<prompt> Enzyme responsible for complete oxidation of glucose to CO2 to water is present inCytosolMitochondriaLysosomesEndoplasmic reticulum  <response>: Ans. is b i.e. Mitochondria The fate of pyruvate formed at the end of glycolysis glucose metabolism is as follows :Under anaerobic conditions : Pyruvate is reduced by the NADH to lactate in the presence of Lactate dehydrogenaseUnder aerobic conditions : Pyruvate is taken up into mitochondria is converted to Acetyl-CoA in the presence of pyruvate dehydrogenase complex. Now this Acetyl-CoA enters Krebs cycle. Krebs cycle is the final pathway where oxidative metabolism of carbohydrates, amino acids fatty acids converge, their carbon skeleton being converted to CO2 and H20. 