Final answer:
Allosteric modulators are molecules that can activate or inhibit enzyme activity by binding to sites other than the active site. They can change the dose-response curves of enzymes.
Step-by-step explanation:
Allosteric modulators are molecules that can either activate or inhibit the activity of an enzyme by binding to sites other than the active site. Allosteric activators modify the active site of the enzyme to increase its affinity for the substrate, while allosteric inhibitors modify the active site to reduce substrate binding. These modulators can affect the dose-response curves of enzymes, meaning that they can change the relationship between the concentration of the modulator and the enzyme activity.