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Xtra Gr 11 Life Sciences: In this lesson on Cellular Respiration we define cellular respiration. We look at the role of glycolysis, Kreb's cycle and oxidative phosphorylation in aerobic respiration. We define anaerobic respiration. We consider alcoholic fermentation and lactic acid fermentation in muscles. We look at the role of anaerobic respiration in industry. Finally, we compare aerobic respiration and anaerobic respiration.