Question

identify the stage of cellular respiration in which each of the following takes place.
produces 32 atp molecules
creates four atp molecules, but then gains overall only two
gives off carbon dioxide
gives off water
produces two atp molecules
done

Explanation:

• Produces 32 ATP molecules: In cellular respiration, the electron transport chain (ETC) is the stage that produces the majority of ATP. Through a series of redox reactions and chemiosmosis, the ETC generates approximately 32 ATP molecules from the energy carried by electron carriers (NADH and FADH₂).
• Creates four ATP molecules, but then gains overall only two: Glycolysis is the first stage of cellular respiration. It involves the breakdown of glucose into two pyruvate molecules. During glycolysis, four ATP molecules are produced by substrate - level phosphorylation, but two ATP molecules are initially invested in the process, resulting in a net gain of two ATP molecules.
• Gives off carbon dioxide: The citric acid cycle (also known as the Krebs cycle) is the stage where carbon dioxide is released. Acetyl - CoA (derived from pyruvate oxidation) enters the cycle, and through a series of reactions, carbon atoms are removed and released as carbon dioxide.
• Gives off water: Water is produced in the electron transport chain. Oxygen acts as the final electron acceptor. When electrons combine with oxygen and protons (\(H^+\)), water (\(H_2O\)) is formed.
• Produces two ATP molecules: The citric acid cycle produces two ATP molecules per glucose molecule (since two acetyl - CoA molecules are produced from one glucose molecule after glycolysis and pyruvate oxidation). This is also through substrate - level phosphorylation.

Answer:

• Produces 32 ATP molecules: Electron transport chain
• Creates four ATP molecules, but then gains overall only two: Glycolysis
• Gives off carbon dioxide: Citric acid cycle
• Gives off water: Electron transport chain
• Produces two ATP molecules: Citric acid cycle