Correct!

How would you describe the regulation of lactose metabolism in the cells described in problem 5 that were able to grow on minimal media with lactose as a nutrient?

A.	normal regulation of lactose metabolism Plac O lac Z DNA sequence on the episome is regulated by the repressor and CRP protein encoded on the bacterial chromosome.
B.	constitutive expression of lac Z
C.	inability to synthesize the lac Z gene product, ß-galactosidase
D.	lac Z gene is inducible, but unable to be repressed by high glucose
E.	no synthesis of the lac I gene product, the lac repressor