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What is the source of energy of all cellular activities in living organisms?

A.) ATP
B.) lactic acid
C.) pyruvic acid
D.) glucose

User Neatnick
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Cells get energy by breaking down food molecules to release the stored chemical energy by a process called 'cellular respiration'.
During the process Oxygen is used to oxidize food, that oxidized food is known as glucose.

D.) glucose
User Zowens
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