Enzymes sometimes .

(A) increase the amount of energy necessary to initiate a reaction.
(B) increase the rate at which a reaction occurs.
(C) catalyze reactions that release energy, but not those that consume energy.
(D) are always consumed by catalyzing a reaction.
(E) reduce the energy released by a reaction by one of four different mechanisms.

Option B) increase the rate at which a reaction occurs.

Enzymes sometimes increase the rate at which a reaction occurs.

Explanation:

Enzymes are specific proteins that possess an active site in their structure that enables them to modify the shape and orientation of subtrate molecules for faster conversion into products.

Thus, by this mechanism enzymes sometimes increase the rate at which a reaction occurs

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