Question

Q. 8 Give scientific reasons:
*(1) Oxygen is necessary for complete oxidation
of glucose.
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Answer 1

Aerobic oxidation is the process by which the metabolism of sugars and fatty acids takes place in the presence of oxygen to produce energy-giving ATP. Thus, oxygen is necessary for the complete oxidation of glucose because it is an aerobic reaction and because oxygen is the oxidizing agent.

Answer 2

Answer:

• All living organism requires energy to live and to perform any useful functions.  
• This energy they get from food they eat. Energy is released when food contains nutrients, let’s say carbohydrate (glucose).  
• Energy released in the cells when oxidation of glucose occurs which means the carbohydrates which we eat converted into simpler substances with the help of oxygen.  
• For complete oxidation of glucose (i.e the breakdown into simpler substances) oxygen is necessary.