During aerobic respiration, glucose is oxidized to:
Correct answer: B. CO2 and water
- A. Lactic acid
- B. CO2 and water
- C. Ethanol and CO₂
- D. Pyruvate
Explanation
During aerobic respiration, glucose is completely oxidized in the presence of oxygen to produce carbon dioxide, water, and energy in the form of ATP. Other possible products, such as lactic acid, ethanol, or pyruvate, occur under different conditions: lactic acid forms during anaerobic respiration in muscles, ethanol and carbon dioxide form during fermentation in yeast, and pyruvate is an intermediate produced during glycolysis before further oxidation. Only carbon dioxide and water represent the final products of complete aerobic glucose oxidation.
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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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