1. There is incomplete oxidation of glucose during anaerobic respiration, while there is complete oxidation during aerobic respiration.
2. The pyruvic acid formed during glycolysis is first converted to Acetyl coenzyme A, which undergoes citric acid cycle to produce critic acid. At the end of citric acid cycle NADH+H+ is released.
3. In both (b) and (c) glycolysis is the first step cellular respiration. The product of glycolysis is further utilized by either fermentation or critic acid cycle.