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Why is oxygen needed in aerobic respiration?

In terms of the link reaction and that jazz

Oxygen is needed to complete the electron transport chain to convert two electrons, two positive charged hydrogen-ions and an oxygen molecule to water. Before this electron transport chain is completed, it comes to an oxidative phosphorylation where three molecules of ADP are converted to three molecules of ATP. For this kind of reaction electrons are needed. After that these electrons are used in electron transport chain.

(edited 8 years ago)

Reply 2

candyswift

Oxygen is important to aerobic respiration because in the last stage (the electron transport chain) it acts as the final electron receptor then goes off at which point due to the oxygen's negative charge it attracts 2 hydrogen's forming water.

Reply 3

Kallisto

Entertainment Forum Helper

To add another information in terms of aerobic respiration, you could be interest in to know that the two positive charged hydrogen-ons and two electrons come from the oxidized FADH2. FADH2 itself is a product of citric acid cycle.