Question
Fermentation permits the continued extraction of energy from glucose in the absence of oxygen. If glucose catabolism is anaerobic, why is fermentation necessary for glycolysis to continue?
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This means that NAD+ gains electrons and also gains a hydrogen atom, becoming NADH. We can write this as: \[NAD^+ \rightarrow NADH\] Show more…
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What is the primary purpose of fermentation regards to cellular respiration? Why does the cell undergo fermentation at all if it is such an inefficient process?
At first glance, the final steps in fermentation appear to be unnecessary: the generation of lactate or ethanol does not produce any additional energy for the cell. Explain why cells growing in the absence of oxygen could not simply discard pyruvate as a waste product. Which products derived from glucose would accumulate in cells unable to generate either lactate or ethanol by fermentation?
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