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Oxygen is the final electron acceptor. Oxygen, with it's great electronegativity, pulls electrons through the electron transport chain where these electrons provide the motive force to pump protons into the outer lumen of the mitochondria. When these protons fall down their concentration gradient oxygen is there to pick then up with the electrons and form water.

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12y ago
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10y ago

Oxygen is need in electron transport chain.O2 acts as last electron acceptor.

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12y ago

Oxygen is the final acceptor of electrons in the electron transport chain (the last step in respiration).

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Q: Why is oxygen needed for the final step in cellular respiration?
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For animals, the final hydrogen acceptr in cellular respiration is


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Cellular respiration requires both glucose and oxygen. Glucose provides the energy for the cell and oxygen is required to be the final electron acceptor so that aerobic respiration can happen. Other molecules can enter cellular respiration and be broken down, but glucose is considered the start of this process. Oxygen is also not required, but if it is not present, then fermentation will run and this process is not nearly as efficient as aerobic respiration.


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Oxygen, in complex IV.


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Oxygen serves as the final electron acceptor in the transport system.It is the only oxidized agent strong enough to do this. Without oxygen, cellular respiration could not occur.


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Oxygen is necessary for aerobic respiration only . It is not required in anaerobic respiration . Oxygen is final electron acceptor and it forms water at end of E.T.C.


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