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How is oxygen important in aerobic respiration?

Answer 1

By being the molecules to Krebs cycle and electron transport

Oxygen is the only molecules to grab the reactive electron from NADH or FADH2 via hydrogen transporter molecules and become water..that is why glucose reaction creates CO2 and H20(water)

Without oxygen molecules enough for aerobic reaction, there is no molecules could catch the hydrogen reactive(reactive electron) from NADH and FADH2.So the NADH and FADH2 accumulated and halt Krebs cycle and halt the reaction from pyruvate to acetyl-CoA

Besides the most valuable energy resources is in electron transport which creates up to 28 ATP-32 ATP.

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Answer 2

Daniel Arnold

Oxygen is important in aerobic respiration because it serves as the final electron acceptor in the electron transport chain, allowing for the production of ATP, which is the main energy currency of cells.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.