题目内容

On a medium containing ampicillin, when pBR322 recombinants were plated. Which of the following will not be able to grow? ___________

A. pBR322 containing gene of interest
B.self-ligated Pbr22
C.non-transformants
D.transformed cells

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In screening for pUC8 recombinants, which color colonies will be the desired recombinants? ___________

A.Blue
B.Colorless
C.White
D.Yellowish

What is the compound X-gal? __________

A.Plasmid
B.Lactose analog
C.Antibiotic
D.Inducer

Which is the most common ligand in Western blotting? __________

A.Lactose
B.Toxins
C.Genes
D.Antibodies

Following the fixation step in blotting, the membrane is placed in RNA or DNA sequence which is _____________ to blot-transferred DNA.

A.Toxic
B.Complementary
C.Larger in size
D.Similar