Respuesta :
In e.coli the lac operon is used to control the expression of the genes involved in the use and metabolism of lactose. under the condition of presence of lactose and absence of glucose the lac structural genes be expressed.
Genes involved in lactose metabolism are found in the lac operon of E. coli.
It only expresses itself when lactose and glucose are both absent.
The lac repressor and catabolite activator protein are two regulators that control the operon's "on" and "off" states in response to lactose and glucose concentrations (CAP).
E. coli and many other intestinal bacteria require the lactose operon (lac operon) for the transport and metabolism of lactose.
Although most bacteria prefer glucose as a carbon source, the lac operon enables efficient lactose digestion in the absence of glucose by activating beta-galactosidase.
The lac operon's gene control is a prime example of prokaryotic gene regulation because it was the first genetic regulatory mechanism to be characterized in detail.
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