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OpenStudy (anonymous):

why do living things use enzymes instead of heat as a source of activation energy?

OpenStudy (anonymous):

Living things use enzymes instead of a heat source of activation energy because they speed up chemical reactions as well as the metabolism in those living things.

OpenStudy (anonymous):

Adding sufficient heat would harm or kill a living thing, also enzymes are far more efficient. A single enzyme can often carry out thousands of reactions per second. Living organisms use enzymes for activation energy because they speed up chemical reactions.

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