Consider the following lac operon genotype:

lacI⁺ lacZ⁻ lacY⁺ lacA⁺

Which of the following statements is therefore true?

• A. The lac operon genes will not be able to convert lactose into glucose and galactose
• B. The lactose cannot be transported into the cell
• C. This strain can grow on lactose-only medium
• D. The lac operon genes are transcribed constitutively

Answer: (A)