False statement is:
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.
Repressor binds operator gene
Regulator genes produce repressor subunits
IPTG is inducer but not substrate
Regulator gene is inducible
Molecular Genetics