The $Lac-Operon$ model was elucidated by

The lactose operon produces which enzymes?

$A$: Operator gene is functional when it is not blocked by repressor.
$R$: Regulator gene produces active protein only which acts on operon system in $E. coli$.

The functional complex that consists of a cluster of genes including structural genes,a promoter gene,an operator gene,and a regulator gene was discovered by:

Which of the following is not a component of the $Operon$ model?

In an inducible operon, the genes are