超星 - Unit Test 8 - 查题吧

单选题

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

单选题

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

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

单选题

What is the compound X-gal? __________

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

单选题

Which is the most common ligand in Western blotting? __________

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

单选题

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

单选题

The rudimentary technology is usually regarded as the ______ one.

A. difficult
B. advanced
C. basic
D. Classical

单选题

When you evade a problem, you try to _______

A. achieve it
B. avoid dealing with it
C. finish it easily
D. do it with great efforts

单选题

If someone backs you up, he/she may

A. agree with you
B. disagree with you
C. give you advice
D. support you in practice

单选题

The older chidren like to ____ that little boy.

A. pick on
B. pick up
C. pick out
D. pick off

单选题

Local governments must ______ their loans in full and on time.

A. win back
B. back up
C. pay back
D. put back

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