Enzymes bind substrates to lower the activation energy, facilitating the formation of products and increasing the reaction rate. They do not change the equilibrium position or decrease the reaction rate, and not all enzymes are proteins (some are RNA molecules called ribozymes).

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An Enzyme

Question 35

Multiple Choice

An enzyme

A) binds substrates in a manner that facilitates the formation of product.
B) does not change the rate at which the equilibrium is achieved.
C) is always a protein.
D) decreases the rate of a reaction.
E) changes the position of the equilibrium of the reaction.

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