<prompt> Enzyme responsible for complete oxidation of glucose to CO2 and water is present in:CytosolMitochondriaLysosomesEndoplasmic reticulum  <response>: Under aerobic conditions, pyruvate is taken up into mitochondria, and after oxidative decarboxylation to acetyl-CoA is oxidized to CO2 by the citric acid cycle.Under anaerobic conditions, pyruvate is reduced by the NADH to lactate, catalyzed by lactate dehydrogenase.Harper 30th edition pg-162 