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E. cool cells with a muted z gene of the lack operon connot grow in medium conatining only lactose as to surce of energy because -A. They cannot synyhesize functionsl betagalctosidesB. They cannot transport lactose from the medium into the cellC. The lac operon is constitutively active in these cellsD. In the presentce of glucose, E. coil cells to not utilize lactose |
| Answer» Correct Answer - A | |