In which stage(s) of cellular respiration is oxygen (O₂) a reactant?Group of answer choicespyruvate oxidationoxidative phosphorylationglycolysiscitric acid cycleNext
Question
In which stage(s) of cellular respiration is oxygen (O₂) a reactant?Group of answer choicespyruvate oxidationoxidative phosphorylationglycolysiscitric acid cycleNext
Solution
Oxygen (O₂) is a reactant in the stage of cellular respiration known as oxidative phosphorylation. This is the stage where the majority of ATP (energy) is produced. Oxygen acts as the final electron acceptor in the electron transport chain, combining with electrons and protons to form water. Without oxygen, this process cannot occur, which is why oxygen is so vital for aerobic organisms.
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