Why is anaerobic respiration energetically less if efficient then aerobic respir

Question

Why is anaerobic respiration energetically less if efficient then aerobic respiration?
The aerobic respiration process uses a respiratory electron transport chain, while anaerobic respiration uses a molecular electron transport chain. Anaerobes use less oxidizing substances like sulfate or nitrate during the electron transport chain so less energy is released per oxidized molecule. Anaerobes use only oxygen during the electron transport chain, wall aerobes use both oxygen and carbon dioxide which results in a more efficient process. Anaerobes terminal electron receptors have larger reduction potentials than 02 meaning that more energy is released per oxidized molecule. Why is anaerobic respiration energetically less if efficient then aerobic respiration?
The aerobic respiration process uses a respiratory electron transport chain, while anaerobic respiration uses a molecular electron transport chain. Anaerobes use less oxidizing substances like sulfate or nitrate during the electron transport chain so less energy is released per oxidized molecule. Anaerobes use only oxygen during the electron transport chain, wall aerobes use both oxygen and carbon dioxide which results in a more efficient process. Anaerobes terminal electron receptors have larger reduction potentials than 02 meaning that more energy is released per oxidized molecule.
The aerobic respiration process uses a respiratory electron transport chain, while anaerobic respiration uses a molecular electron transport chain. Anaerobes use less oxidizing substances like sulfate or nitrate during the electron transport chain so less energy is released per oxidized molecule. Anaerobes use only oxygen during the electron transport chain, wall aerobes use both oxygen and carbon dioxide which results in a more efficient process. Anaerobes terminal electron receptors have larger reduction potentials than 02 meaning that more energy is released per oxidized molecule.

Explanation / Answer

The correct answer is option D.

Anaerobic respiration using electron acceptors other than oxygen whereas in aerobic respiration, electrons are shuttled to an electron transport chain and oxygen is the final electron acceptor. So aerobic respiration produces more amount of energy than anaerobic respiration.

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