Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

تمرين 6

How is the gene for β-galactosidase used in the construction of a plasmid
A) The gene is a promoter that is sensitive to the presence of the sugar, galactose.
B) It is an origin of replication.
C) It is a cloning site.
D) It is a marker for insertion of DNA.