Oxygen is vital to the process of aerobic cellular respiration. It allows aerobic organisms to derive a great deal more energy from glucose than anaerobic organisms are able to. What is the vital role that oxygen plays in cellular respiration?
A) It is a reactant in glycolysis, necessary for the breakdown of glucose into pyruvic acid.
B) Oxygen is a waste product of Kreb's cycle.
C) Oxygen is required to build the acetyl-CoA molecule.
D) Oxygen is the final electron acceptor in the electron transport chain.
Answer: D) Oxygen is the final electron acceptor in the electron transport chain.
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