Genes that are involved in turning on or off the transcription of a set of structural genes are called
Polymorphic genes
Operator genes
Redundant genes
Regulatory genes
In lac operon, $z$ gene codes for:
In an inducible operon, the genes are
Functioning of structural genes is controlled by
'Operon model' for gene regulation in bacteria was proposed by
In the lac operon, the structural genes are switched off when