Problem: Yeast can grow both aerobically and anaerobically on glucose. Explain why the rate of glucose consumption decreases when yeast cells that have been maintained under anaerobic conditions are exposed to oxygen.

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During anaerobic conditions, yeast are known to process glucose through glycolysis, followed by alcohol fermentation. This glycolysis process produces a net of 2 ATP molecules per glucose molecule. The alcohol fermentation, on the other hand, do not produce or use ATP but it oxidizes NADH to NAD+, which is a coenzyme used in glycolysis.

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Yeast can grow both aerobically and anaerobically on glucose. Explain why the rate of glucose consumption decreases when yeast cells that have been maintained under anaerobic conditions are exposed to oxygen.

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