Question: An E . coli strain is lac r . The lac + DNA sequence encodes the lactose repressor. How would you describe the regulation of

An E. coli strain is lac r. The lac +DNA sequence encodes the lactose repressor. How would you describe the regulation of lactose metabolism in these cells?
Multiple Choice
lac Z+ gene is inducible, but unable to be repressed by high glucose.
normal regulation of lactose metabolism.
inability to synthesize the lac Z+ gene product, B-galactosidase.
constitutive synthesis of the lac / gene product, the lac repressor
constitutive expression of lac Z+.
An E . coli strain is lac r . The lac + DNA

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