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Enzymes facilitate chemical reactions. Many are catalysts that decrease the amount of energy required for or increase the rate of chemical reactions to take place. Many enzymes work by bringing the substrates of a chemical reaction into close proximity and in favorable orientation. They may also allow the chemical reaction to use chemically stored energy (ex. ATP, GTP etc) to power the reaction.

Without these enzymes, some of the reactions would be extremely slow or require excessive temperatures to complete.

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14y ago

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