Which one of the following statements is incorrect?

• A

  The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.

• B

  The presence of the competitive inhibitor decreases the Km  of  the  enzyme for the substrate.

• C

  A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex.

• D

  In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.