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.
Synthesis of the active hormone formed from vitamin D or its precursor in skin.
The small-scale distribution of different tree species in a Douglas-fir forest is determined by both
A blood smear. The smear reveals representative cells from each formed element group: red blood cell
Formed Elements of Blood
Common skin signs are often evidence of an illness or disorder. A pustule is a small, elevated, ...
Small intestine.