20. Estimate the maximum number of ATP molecules that can be generated during cellular respiration.

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20. Estimate the maximum number of ATP molecules that can be generated during cellular respiration.

answer:

 Cellular respiration:

  1. Cellular respiration is an important process, during which organisms utilize oxygen to metabolize food molecules to supply biochemical energy for cell processes.
  2. The processes of cellular respiration involve glycolysis, Krebs cycle, and electron transport chain.
  3. For every glucose molecule, the overall ATP output from full oxidation is 36 or 38 ATP.
  4. Glycolysis produces two ATP molecules.
  5. While Krebs' cycle produces two GTP molecules. These two GTP molecules are therefore turned into two ATP molecules.
  6. Electron Transport System generates 32 or 34 ATP molecules and is the cell's main source of energy.
  7. Thus, the electron transport system produces the most ATP in cellular respiration.

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