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Answer:

The correct answer would be B-alcohol fermentation.

Alcohol fermentation or ethanol fermentation is a type of anaerobic respiration by which organism (such as yeast) convert sugar such as glucose, sucrose et cetera into ethanol and carbon dioxide in order to produce energy.

First, glucose is converted into 2 molecules of pyruvate by the process of glycolysis. It leads to the formation of 2 molecules of ATP (adenosine triphosphate) and 2 molecules of NADH.

Then, two molecules of pyruvate are converted into two molecules of acetaldehyde with the help of enzyme pyruvate decarboxylase. Two molecules of carbon dioxide are released as a byproduct.

Lastly, two molecules of acetaldehyde are converted into two molecules of ethanol with the help of enzyme alcohol dehydrogenase. It consumes two NADH and regenerates two NAD⁺ lost during the process of glycolysis.

Hence, the net gain of alcohol fermentation is two ATP.

Thus, we can say that ethanol is produced during alcohol fermentation.

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During alcohol fermentation ethanol is produced.

Alcohol fermentation involves the break down of sugars in organisms such as yeast to form ethanol or alcohol, carbon dioxide and release energy.

Further Explanation;

Anaerobic respiration

  • Anaerobic respiration on the other hand is a type of respiration that occurs in absence of oxygen gas.
  • It involves the breakdown of organic compounds to form small amount of energy in the form of ATP and ethanol or lactic acid as byproducts.

Alcohol fermentation

  • Alcohol fermentation is a type of anaerobic respiration where an alcohol is formed as a byproduct.
  • During alcohol fermentation organism such as yeast convert sugars such as glucose, sucrose into ethanol and carbon dioxide in order to produce energy.

Stages of Alcohol Fermentation

Glycolysis;

  • One glucose molecule is broken down to pyruvate and two molecules of ATP are formed. This leads to generation of two molecules of ATP and two molecules of an energy carrier NADH.

Fermentation;

  • Pyruvate from glycolysis is converted to ethanol.
  • This occurs in two steps

Step 1

  • Pyruvate is first converted into two molecules of acetaldehyde, which is catalyzed by the enzyme pyruvate dehydrogenase and two molecules of carbon dioxide are released as byproduct.

Step 2

  • Acetaldehyde is then converted into ethanol by the enzyme alcohol degydrogenase which consumes the two molecules of NADH and regenerates NAD+ used during glycolysis.

Keywords: Anaerobic respiration, Fermentation, alcohol fermentation, Glycolysis, steps involved in alcohol fermentation

Learn more about:

  • Cellular respiration: https://brainly.com/question/7419007
  • Glycolysis; https://brainly.com/question/7419007
  • Fermentation: https://brainly.com/question/7419007
  • Alcohol fermentation: https://brainly.com/question/7419007

Level: High school

Subject: Biology

Topic:  Respiration

Sub topic: Alcohol fermentation

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