Moderate

What occurs in the absence of oxygen:

Correct answer: D. Alcoholic and lactic acid fermentation

  • A. Alcoholic fermentation
  • B. Respiratory electron transport chain
  • C. Lactic acid fermentation
  • D. Alcoholic and lactic acid fermentation

Explanation

Both alcoholic fermentation and lactic acid fermentation occur in absence of oxygen. It is also called anaerobic respiration.

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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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