An allosteric modulator changes the enzyme activity by: Bbl6epure opuH orBer: None of the above Competing for the catalytic site with the substrate Changing the specificity of the enzyme for its substrate Precipitating of enzyme molecule Binding to a site on the enzyme molecule distinct from the catalytic site

The correct answer is: Binding to a site on the enzyme molecule distinct from the catalytic site.<br /><br />An allosteric modulator is a molecule that binds to an enzyme at a site other than the active site, known as the allosteric site. This binding causes a conformational change in the enzyme, which can either enhance or inhibit its activity. By binding to the allosteric site, the modulator alters the enzyme's conformation and, consequently, its activity. This mechanism allows the enzyme to be regulated in a more precise and controlled manner.