The end product of fermentation are

  1. A) CO2 and acetaldehyde
  2. B) O2 and C2H5OH
  3. C) CO2 and C2H5OH
  4. D) CO2 and O2

Answer: C) CO2 and C2H5OH

Explanation: Fermentation is anaerobic respiration and occurs in the absence of oxygen. During alcoholic fermentation, pyruvic acid (the end product of glycolysis) is first converted into acetaldehyde by pyruvate decarboxylase and CO2 is released. Acetaldehyde is further reduced to alcohol by the enzyme alcohol dehydrogenase. Therefore, the end products of alcoholic fermentation are carbon dioxide and ethanol (CO2 and C2H5OH).

Alcoholic fermentation process

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