59.In Escherichia coli, lac operon is induced by A. Lactose B. Promoter gene C. ẞ-galactosidase D. I-gene
Option A lac operon in E. coli is an operon which contains genes involved in lactose metabolism. But this operon is turned "on" only when there is lactose present in the medium. In the absence of lactose, lac operon remains turned "off''
