Question
Why do we get instant energy from glucose?

Answer

Glucose is the simplest form of sugar. It can directky be absorbed by intenstine and can easily be transported by blood to various cells of the body. Cells directly act on glucose along with oxygen to given energy.
While carbohydrates are complex forms of sugars and they need to be further broken down into simpler substances like glucose before absorption. Hence it requires extra time as compared to glucose which provides instant energy.

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