Which explanation best explains the role of enzymes as catalysts in living systems?
a.
enzymes accelerate chemical reactions without getting used up in the process.
b.
enzymes accelerate chemical reactions by getting used up in the process.
c.
enzymes decelerate chemical reactions by getting used up in the process.
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b

Explanation:

cause enzymes to speed up the reaction.

The answer is A, they accelerate without being used up

Explanation:

"Enzymes aren't changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again."

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.