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Standard XII
Biology
Respiratory Balance Sheet
Question

Oxygen is necessary for complete oxidation of glucose. Give scientific reasons.

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Solution
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Scientifically, oxidation means addition of oxygen to a molecule. Various organic compounds such as carbohydrates, lipids and proteins are oxidised in presence of oxygen to release energy. The chemical bond energy which is stored in these molecules, is decomposed or oxidised in this process. Hence, complete oxidation of glucose requires oxygen. The net reaction is shown as:
6O2+C6H12O6+38ADP→38ATP+6CO2+6H2O.

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