What are the end products formed during anaerobic respiration in yeast cells?
Ethanol and carbon dioxide
Yeast is a facultative anaerobe: when oxygen is not available, it breaks down glucose only up to pyruvate through glycolysis and then converts the pyruvate further without using oxygen. This process is called anaerobic respiration, or alcoholic fermentation.
In yeast the pyruvate is decarboxylated and reduced to give ethanol and carbon dioxide, along with a small amount of ATP. So the end products of anaerobic respiration in yeast are ethanol and carbon dioxide. Lactic acid and water are produced in the muscles of animals under low oxygen; glucose and oxygen are the reactants of aerobic respiration, not products; water and oxygen are not produced without oxygen being available.
Hence, the answer is Ethanol and carbon dioxide.
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