Final answer:
Anaerobic respiration occurs in the absence of oxygen, and it involves the breakdown of pyruvate into either lactic acid or ethanol. In alcoholic fermentation, which is carried out by yeast, pyruvate is converted to acetaldehyde and then to ethanol.
Step-by-step explanation:
Anaerobic respiration occurs in the absence of oxygen, and it involves the breakdown of pyruvate into either lactic acid or ethanol. In the case of alcoholic fermentation, which is carried out by yeast, the pyruvate is converted to acetaldehyde and then to ethanol. This process occurs in the cytoplasm of the cell.