Biology 11th Edition by Cecie Starr ,Ralph Taggart

Exercise 17

Geraldo isolated an E. coli strain in which a mutation has hampered the capacity of CAP to bind to a region of the lactose operon, as it would do normally. How will this mutation affect transcription of the lactose operon when the E. coli cells are exposed to the following conditions Briefly state your answers:
a. Lactose and glucose are both available.
b. Lactose is available but glucose is not.
c. Both lactose and glucose are absent.