In the reaction catalyzed by aspartate transcarbamoylase, a graph in which the rate is plotted against the concentration of substrate
A) is sigmoidal, characteristic of an allosteric enzyme
B) shows that noncooperative kinetics are observed
C) shows that the reaction is zero order
D) is hyperbolic, characteristic of a nonallosteric enzyme

Question

Quizplus · Accepted Answer

Aspartate transcarbamoylase exhibits sigmoidal kinetics, which is characteristic of allosteric enzymes. This behavior indicates cooperative binding of substrate, where the binding of one substrate molecule increases the enzyme's affinity for additional substrate molecules.

In the Reaction Catalyzed by Aspartate Transcarbamoylase, a Graph in Which