Which one of the following statement is incorrect ?
(a) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor.
(b) In competitive inhibition the inhibitor molecule is not chemically changed by the enzyme.
(c) The competative inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
(d) The presence of the competitive inhibitor decreases the km of the enzyme for the substrate.
(d) In the presence of a competitive inhibitor, Vmax remains unchanged while Km increases.