You are working with an enzyme and wish to determine its saturation point.You note that the reaction rate increases slowly at first, then increases dramatically over a narrow range of substrate concentrations, and then levels off, creating a sigmoid reaction curve.It is likely that this enzyme is regulated by

Question

Quizplus · Accepted Answer

The sigmoid reaction curve with a dramatic increase in reaction rate over a narrow range of substrate concentrations followed by leveling off indicates allosteric regulation. This means that the enzyme has a regulatory site, separate from the active site, that can bind to specific molecules and alter the enzyme's activity. This mode of regulation is not observed with temperature, pH, competitive inhibitors, or coenzymes.

You Are Working with an Enzyme and Wish to Determine