Answer :
No, due to the fact lactose is damaged down into glucose, that's already ample. A normal E. coli cell is grown for several hours in the presence of glucose.
If each glucose and lactose are both present, lactose binds to the repressor and stops it from binding to the operator region. The block of lac gene transcription is consequently lifted, and a small amount of mRNA is produced.
Escherichia coli can use the disaccharide lactose as a source of metabolic electricity. Lactose is first transported throughout the plasma membrane by means of the membrane carrier lactose permease, then it is cleaved to free glucose and galactose by the enzymeβ-galactosidase.
Glucose requires fewer steps and less energy to interrupt than lactose. but, if lactose is the best sugar available, the E. coli will cross right ahead and use it as an electricity source. to use lactose, the microorganism should express the lac operon genes, which encode key enzymes for lactose uptake and metabolism.
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