Cells use the chemical reactions to change the chemical stored in food into forms needed to perform activities.

Cell use the chemical  reaction to the chemical ENERGY stored in food into other forms needed to perform activities.

Explanation:

ATP is the enengy currency of cell it is stored as chemical energy in foods.When we intake food the cell utilize the chemical energy by stimulating the hydrolysis of ATP stored in foods.

         The hydrolysis of ATP generate energy which is used by the cell to carry out various biological and physiological activities such as membrane transport,muscle contraction,synthesis of macromolecules such as protein,lipid,carbohydrates.

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