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There are three categories for reversible enzyme inhibitors based on the impact of these inhibitors on Michaelis constant and Maximal Velocity (${ V }_{ max }$). The ${ K }_{ I }$ is equilibrium constant for the dissociation of the enzyme-inhibitor complex.

An enzyme assay was done in the absence as well as the presence of a 1 mM concentration of inhibitor A (red line) and inhibitor B ( blue line).

The velocity was measured at a range of substrate concentrations and the results were used to construct a Lineweaver-Burk plot which is shown.

It can be seen from this graph that both inhibitor A and B
Select Option decreasedincreaseddid not change
the Michaelis constant and
Select Option decreasedincreaseddid not change
the Maximal Velocity. Based on this graph, inhibitor A and B are
Select Option competitivenoncompetitive (mixed)uncompetitive
inhibitors for this enzyme.
Select Option Inhibitor AInhibitor BNeither inhibitor A nor B
is the better inhibitor and has the
Select Option higherlowersame
value for${ K }_{ I }$ .
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