What best explains the observation that enzymes are selective in the reactions they catalyze?

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Ibelieve its because the stove is a cleaner burning fuel

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Iwould but i dont know the answer