KROK 1 Stomatology 2014 – Question 121 · KROK (Dentistry)

In some anaerobic bacteria the pyruvate produced by glycolysis is converted to the ethyl alcohol (alcoholic fermentation). What is the biological significance of this process?

  1. A. Lactate production
  2. B. ATP production
  3. C. Providing the cells with NADPH
  4. D. ADP production
  5. E. NAD⁺ replenishment
Hint

Consider which coenzyme is reduced at the glyceraldehyde-3-phosphate dehydrogenase step of glycolysis and how it can be reoxidised without oxygen.

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