False statement is:: (A) Repressor binds operator gene, (B) Regulator genes produce repressor subunits, (C) IPTG is inducer but not substrate, (D) Regulator gene is inducible
Answer is D. Ans. D. Regulator gene inducible(Ref: Harper 31/e page 412)Structural genes are inducible, not the regulator genes.Lac I gene produces Repressor subunits.IPTG is an inducer of lac-operon, but itself is not a substrate. This is called gratuitous inducer.