Which of the following statements is true of fermentation?
Correct answer: D. Fermentation produces byproducts such as lactic acid or ethanol
- A. Fermentation occurs in the absence of oxygen
- B. Fermentation produces large amounts of ATP
- C. Fermentation results in the complete oxidation of glucose
- D. Fermentation produces byproducts such as lactic acid or ethanol
Explanation
Fermentation is an anaerobic process that occurs without oxygen and allows organisms to produce energy when oxygen is unavailable. It generates only a small amount of ATP and does not completely oxidise glucose. Instead, it converts glucose into simpler compounds such as lactic acid or ethanol, depending on the organism. Among the given statements, the correct one is that fermentation produces byproducts like lactic acid or ethanol.
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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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