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.