In Operon concept, the regulator gene regulates chemical reactions in the cell by

'Operon model' for gene regulation in bacteria was proposed by

Which enzyme / enzymes are responsible for transformation of lactose to galactos in the E.coli culture medium.

Definitions/Explanation : A promoter & The structural gene
 

Lactose operon produces enzymes

Which of the following is required as inducer(s) for the expression of Lac operon?