<prompt> a drug that compete for active binding is calledCompetitive inhibitorNon competitive inhibitorCovalent inhibitorAny of These  <response>: In competitive inhibition of enzyme catalysis, binding of an inhibitor prevents binding of the target molecule of the enzyme, also known as the substrate. This is accomplished by blocking the binding site of the substrate - the active site - by some means. Ref-KDT 7e p39 