Question

which statements accurately summarize the events of cellular respiration? select all that apply.
at the end of the electron transport chain, the energy that was originally in glucose is now in the form of atp.
carbon atoms in glucose are oxidized during glycolysis, pyruvate processing, and the citric acid cycle.
oxygen is reduced to form water at complex iv of the electron transport chain.
incorrect
energy from glucose enters the electron transport chain in the form of nadh and fadh₂ and ends as a strong proton (h⁺) gradient. atp is not formed at the electron transport chain.

Explanation:

• Cellular respiration involves a series of processes. In glycolysis, pyruvate processing, and the citric acid cycle, carbon atoms in glucose are oxidized.
• The electron transport chain is a key part. At the end of it, the energy that was originally in glucose is now in the form of ATP (through chemiosmosis where the proton gradient drives ATP synthesis).
• At Complex IV of the electron transport chain, oxygen acts as the final electron acceptor. It is reduced to form water.

Answer:

• At the end of the electron transport chain, the energy that was originally in glucose is now in the form of ATP.
• Carbon atoms in glucose are oxidized during glycolysis, pyruvate processing, and the citric acid cycle.
• Oxygen is reduced to form water at Complex IV of the electron transport chain.