To Date,several Lactose Metabolism Mutants Have Been Found in Escherichia

question 20

Multiple Choice

To date,several lactose metabolism mutants have been found in Escherichia coli.One of these mutants has a phenotype in which the cell cannot accumulate lactose because no lactose permease protein is present.What genotype would be associated with this mutation?

• A)lacZ⁻
• B)lacY⁻
• C)lacI⁻

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