What is the role of Oxygen in respiration?

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Oxygen is one of the most electronegative elements on the planet. It acts as the final receptor of electrons in the electron transport chain and chemiosmosis process, the final step of cellular respiration.
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Cellular respiration is the process cells use to retrieve energy stored in carbohydrates, fats and proteins. Glucose and other molecules are broken down, and the energy released is used to make another molecule called adenosine triphosphate (ATP), the “energy currency” of the cell. While our cells can...
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Cellular respiration is the process cells use to retrieve energy stored in carbohydrates, fats and proteins. Glucose and other molecules are broken down, and the energy released is used to make another molecule called adenosine triphosphate (ATP), the “energy currency” of the cell. While our cells can use fermentation to make ATP without using oxygen, cellular respiration is far more efficient humans and most other animals quickly die if deprived of oxygen . read less
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teacher

Without oxygen cellular respiration could not occur and it helps in electron transport chain
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Oxygen used oxidises the blood or it just clear the impurities in the blood during respiration
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It is used in aerobic respiration. It combines with organic food to give carbondioxide & water.
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Respiration takes places so that oxygen enters the body. Later into blood vessels and cells and then into the Electron transport chain where it helps in redox reaction. During respiration as such oxygen's percentage (21%) in the air helps it to diffuse through the blood vessels. This is called Partial...
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Respiration takes places so that oxygen enters the body. Later into blood vessels and cells and then into the Electron transport chain where it helps in redox reaction. During respiration as such oxygen's percentage (21%) in the air helps it to diffuse through the blood vessels. This is called Partial pressure. read less
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Breaking the glucose into energy
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Oxygen is the FINAL electron acceptor in the ETC, which occurs in the mitochondria. Glucose is the initial substrate needed to start glycolysis (the oxidation of glucose). Source
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