When you eat a candy bar, your body oxidizes glucose to get energy. where does this energy come from? kinetic energy of the glucose molecules chemical bonds within the glucose molecules work done on both oxygen and glucose molecules kinetic energy of the oxygen molecules?

The correct answer is
"chemical bonds within the glucose molecules "

The chemical bonds of the glucose molecules contain chemical energy, and when these bonds are broken by the processes acting inside the body, the energy of the bonds is released and it can be used by the body.

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