The lacZ and lacY genes are transcribed when:
A. lactose is present, regardless of the level
of glucose in the cell.
B. lactose is absent and glucose levels are
high.
C. lactose is present and glucose levels are
low.
D. glucose levels are high and lactose levels
are low.
E. glucose levels are low, regardless of the
level of lactose in the cell.
C
You might also like to view...
A nucleotide may contain a(n)
a. base. b. 5-carbon sugar. c. phosphate group. d. adenine. e. all of these
A(n) inorganic compound is one that contains carbon. Indicate whether the statement is true or false
The accumulation of free oxygen in Earth's atmosphere began with the origin of _____
A) life and respiratory metabolism B) cyanobacteria using photosystem II C) chloroplasts in photosynthetic eukaryotic algae D) land plants
Nonpolar molecules develop when:
A) shared electrons are not shared equally. B) one atom is much more electronegative than the other. C) electrons are completely transferred from one atom to another. D) both atoms have similar electronegativity.