Enzyme responsible for complete oxidation of glucose to CO2 to water is present in

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.* Kreb's cycle is the final pathway where oxidative metabolism of carbohydrates, amino acids & fatty acids converge, their carbon skeleton being converted to CO2 and H20.