The end product of glycolysis is
Correct answer: B. pyruvic acid
- A. lactic acid
- B. pyruvic acid
- C. acetyl CoA
- D. citric acid
Explanation
Glycolysis splits the six carbon glucose into two three carbon molecules of pyruvic acid, and what happens next depends on whether oxygen is available. Lactic acid is formed only afterwards, in anaerobic conditions in muscle, and acetyl CoA only afterwards in the link reaction inside the mitochondrion. Citric acid is the first product of the Krebs cycle, two stages later.
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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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