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

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⁻