Repressor protein is formed from
Repressor gene
Structural gene
Operator gene
Regulatory gene
In the lac operon, the structural genes are switched off when
Lac operon is
Define an operon, giving an example, explain an Inducible operon.
Genes that are involved in turning on or off the transcription of a set of structural genes are called
E.coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source energy because