Allolactose, an isomer of lactose, is formed in small amounts from lactose. An E. coli cell is presented for the first time with the sugar lactose (containing allolactose) as a potential food source. Which of the following occurs when lactose enters the cell?
A) can grow only on the plates with glucose
B) it cannot bind to the inducer
C) allolactose binds to the repressor protein
D) cells would expend significantly more energy
