Which of the following is a chemical link between catabolism and anabolism?
Correct answer: C. ATP
- A. AMP
- B. ADP
- C. ATP
- D. All of these
Explanation
ATP links catabolism and anabolism because energy released during catabolic reactions is stored in ATP and then supplied by ATP hydrolysis for anabolic reactions. Students may choose ADP because it is produced when ATP is used, but ADP is mainly the lower-energy product rather than the principal energy-transfer link.
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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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