Anaerobic respiration occurs in man when there is intensive exercise or stress on a muscle which leads to inadequate oxygen in the cells, the pyruvic acid gets reduced to lactic acid, and this is known as homolactic fermentation.
Anaerobic respiration occurs in yeasts when there occurs incomplete oxidation of glucose, and there isn’t any presence of oxygen, i.e., anaerobic conditions. The pyruvic acid is reduced into C2H5OH, i.e., Ethanol and release CO2. This is known as alcoholic fermentation.
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