How is the gene for beta-galactosidase used in the, Ask an Expert

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A) How is the gene for β-galactosidase used in the construction of a plasmid?

The gene is a promoter that is sensitive to the presence of the sugar, galactose.
It is an origin of replication.
It is a cloning site.
It is a marker for insertion of DNA.

B) A DNA library is

an orderly array of all the genes within an organism
a collection of vectors
the collection of plasmids found within a single E. coli
a collection of DNA fragments representing the entire genome of an organism

C) What enzyme is needed in order to make a cDNA library?

DNA helicase
RNA polymerase
Reverse transcriptase
Restriction exonuclease

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Biology, Academics

Category:- Biology
Reference No.:- M9437069

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