Competitive Inhibitor: A competitive inhibitor competes with the substrate for binding at the enzyme's active site because it has similar structural features.
Noncompetitive Inhibitor: A noncompetitive inhibitor binds to another part of an enzyme rather than its active site, causing changes in shape that prevent proper functioning.
Allosteric Regulation:Allosteric regulation occurs when a molecule binds to a site on an enzyme other than the active site, resulting in changes to the enzyme's activity.