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

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