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 the lactose enters the cell?
A) The repressor protein attaches to the regulator.
B) Allolactose binds to the repressor protein.
C) Allolactose binds to the regulator gene.
D) The repressor protein and allolactose bind to RNA polymerase.
E) RNA polymerase attaches to the regulator.
Parasitic Hookworms in the small intestine
The formed elements: In this image, the red cells are red, the white cells are white, and the ...
Anatomy of the Small Intestine
Small Plates
Bacterial small noncoding RNAs regulate gene expression
Summary of digestion and absorption in the small intestine