For an Enzyme-Substrate Pair, a Graph of Reaction Rate Versus

Multiple Choice

For an enzyme-substrate pair, a graph of reaction rate versus substrate concentration gives an S-shaped curve. From these data which of the following is the most likely conclusion?

A) The enzyme conforms closely to the Michaelis equation.
B) The enzyme contains more than one kind of polypeptide chain.
C) In high concentrations, the substrate is an inhibitor.
D) More than one binding site for the substrate is present in each enzyme unit.
E) The enzyme is subject to product inhibition.