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
E.coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source energy because
The lac operon consists of
In lac operon, $z$ gene codes for:
What effect would you expect if gene expression of the lac operon were completely repressed?
A low level of expression of lac operon occurs at all the time. Can you explain the logic behind this phenomena.