The total number of ATP produced when a molecule of glucose undergoes fermentation is?
Correct answer: C. 2
- A. 4
- B. 36
- C. 2
- D. 38
Explanation
Anaerobic respiration is a type of respiration that produces energy without using oxygen as the final electron acceptor.In microorganisms, the term anaerobic respiration is replaced by fermentation.Fermentation of glucose occurs in two stages.During the first stage, glucose is converted into pyruvate through the multi-step process of glycolysis and 2 ATP and 2 NADH are generated.In the next stage, the pyruvate that is formed during glycolysis is broken down into lactic acid or ethanol and carbon dioxide. ATP is not produced during this stage, instead the 2 NADH generated during the previous stage are consumed.Thus a total of 2 ATPs are generated from the fermentation of a glucose molecule.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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