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Question : The E-coil cells, having '2' gene in lac operon do not grow on medium containing lactose as sole source of energy because,

Answer»

in these CELL, lac operon is active.
they cannot synthesis active `beta`-GALACTOSIDASE
E-coli cell do not UTILIZE lactose in presence of glucose
they cannot transfer lactose from MEDIUM into the cells.

Solution :they cannot synthesis active `beta`-galactosidase


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