Most enzymes A have no effect on the rate of the chemical reaction
B speed up the chemical reaction
slow the rate of the chemical reaction
D keep the rate of the chemical reaction the same

B. Speed up the chemical reaction

Explanation: Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.

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