what types of organisms go through fermentation?
- Without oxygen, these cells only undergo glycolysis and produce 2 ATP per glucose molecule. Next, they need to reduce pyruvate to regenerate NAD+ from NADH + H+. Fermentation is the process that performs this job. In lactic acid fermentation, pyruvate is reduced to lactic acid. This occurs in cells such as our muscles when we're exercising. In alcoholic fermentation, pyruvate is reduced to alcohol and releases carbon dioxide.