Question

Which one of the following characteristics best applies to an allosteric effector?

• A. Competes with the substrate for the catalytic site
• B. Binds to a site on the enzyme molecule distinct from the catalytic site
• C. Changes the nature of the product formed
• D. Changes substrate specificity of the enzyme

Answer 1

The correct option is B

Binds to a site on the enzyme molecule distinct from the catalytic site

Allosteric regulation (or allosteric control) is the regulation of a protein by the binding of an effector molecule at a site other than the protein's active site. The site to which the effector binds is termed the allosteric site. After binding, the active site is changed in such a way that the activity of the enzyme is either increased or decreased.