The combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes is

The combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes is called metabolism.

Its main purpose is to convert food to energy.

Explanation:

Metabolism can even confer with the add of all chemical reactions that occur in living organisms, together with digestion and therefore the transport of drugs into and between totally different cells, during which case the set of reactions among the cells is named intermediator metabolism or intermediate metabolism.

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