Question

oxygen is necessary for complete oxidation of glucose

Answer 1

Hey mate

To understand this, first we must know what oxidation is.

Oxidation is the process of gain of oxygen to a compound due to which its chemical composition changes. It may also be defined as the loss of hydrogen atoms or loss of electrons. An oxidizing agent is necessary to bring about this change

This oxidation process maybe aerobic or anaerobic.

Aerobic oxidation is the process by which the metabolism of sugars and fatty acids take place in the presence of oxygen to produce energy giving ATP.

Looking at the reaction of oxidation of glucose (image attached) we see that glucose is oxidised in the presence of oxygen.

Thus, oxygen is necessary for the complete oxidation of glucose because it is an aerobic reaction and because oxygen is the oxidizing agent.

Hope it helps you!

Answer 2

Here's the answer

When glucose is completely oxidised in aerobic respiration, it produces 38 molecules of ATP.

In cellular respiration, three processes take place one after the other. They are Glycolysis , Krebs cycle and election transfer chain reaction.

In absence of oxygen , Glycolysis can occur only but other further reaction will not take place.

If Glycolysis occurs in the absence of oxygen, it produces alcohol. By anaerobic Glycolysis, only 2 molecules of ATP are produced. This results in less energy supply to the body.

Therefore, Oxygen is necessary for complete oxidation of glucose.

Thanks!