Which Is Least Likely to Occur in a Non-Mutant Bacterial

Multiple Choice

Which is least likely to occur in a non-mutant bacterial cell?

A) -galactoside transacetylase is present at a high concentration when -galactoside is present at a low concentration.
B) -galactoside transacetylase is produced at very low levels in the absence of lactose.
C) -galactoside transacetylase is produced at very low levels when glucose is abundant.
D) -galactoside transacetylase is produced at high levels when lactose is at a high concentration and glucose is not available.
E) -galactoside transacetylase and β-galactoside are both present in very low concentrations.