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

question 54

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 Michaelis-Menten kinetics.
• B) The enzyme contains more than one kind of polypeptide chain.
• C) At high concentrations, the substrate is an inhibitor of the reaction.
• D) More than one binding site for the substrate is present in each enzyme subunit.
• E) The enzyme is subject to product inhibition.