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) lacI^- B) lacZ^- C) lacY^-

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The lacY gene in Escherichia coli encodes the lactose permease protein, which is responsible for the transport of lactose into the cell. A mutation in the lacY gene would result in the absence of lactose permease, leading to the phenotype where the cell cannot accumulate lactose.

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