medium · MCAT bio-biochem
An enzyme-catalyzed reaction is observed in the presence of a molecule that increases the K_M but does not alter the V_max of the reaction.
Which of the following best describes the interaction between this molecule and the enzyme?
- The molecule permanently alters enzyme structure via covalent modification of a key active-site residue.
- The molecule binds to the active site and can be outcompeted by high substrate concentrations.
- The molecule binds an allosteric site regardless of whether the substrate is bound.
- The molecule binds only to the enzyme-substrate complex, thereby lowering both V_max and K_M.
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