Complete breakdown of glucose molecule takes place in which of the following?
Correct answer: C. Aerobic respiration
- A. Alcoholic fermentation
- B. Lactic acid fermentation
- C. Aerobic respiration
- D. All of these
Explanation
Aerobic respiration completely oxidizes glucose to carbon dioxide and water through glycolysis, the Krebs cycle and the electron transport chain. The likely mistake is choosing alcoholic or lactic acid fermentation because both begin with glucose breakdown, but fermentation stops before complete oxidation and leaves energy-rich end products.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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