Suppose That a Strain of E

question 20

Multiple Choice

Suppose that a strain of E. coli containing a mutant lac operon is discovered. Also suppose that the mutant operon is normal in terms of its regulation, but the lacY gene produces a defective protein. Which metabolic function will be impaired in this bacterium?

• A) transport of lactose into the cell
• B) transacetylase
• C) binding of the repressor to the operator
• D) conversion of lactose into monosaccharides

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