题目内容

Plasmids are important in biotechnology because they are

A. a vehicle for the insertion of recombinant DNA into bacteria.
B. surfaces for respiratory processes in bacteria.
C. recognition sites on recombinant DNA strands.
D. surfaces for protein synthesis in eukaryotic recombinants.
E. proviruses incorporated into the host DNA

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Please put them in order①Transfer of the ligated plasmid into an E. coli strain②isolation the desired target fragment③Selection of transformed bacteria④Ligation of the fragment into a new plasmid vector

A. ①②③④
B. ④③②①
C. ②④①③
D. ②④③①

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DNA molecules can be cut into sections by using:

ATP
B. Gel electrophoresis
C. Plasmid
D. A probe
E. Restriction endonuclease

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Bacteria containing recombinant plasmids are often identified by which process?

A. removing the DNA of all cells in a culture to see which cells have plasmids
B. examining the cells with an electron microscope
C. exposing the bacteria to an antibiotic that kills the cells lacking the plasmid
D. producing antibodies specific for each bacterium containing a recombinant plasmid

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There are two kinds of DNA libraries, they are _ libraries and _ libraries。

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Plasmids are important in biotechnology because they are

A. a vehicle for the insertion of recombinant DNA into bacteria. B. surfaces for respiratory processes in bacteria. C. recognition sites on recombinant DNA strands. D. surfaces for protein synthesis in eukaryotic recombinants. E. proviruses incorporated into the host DNA

Please put them in order①Transfer of the ligated plasmid into an E. coli strain②isolation the desired target fragment③Selection of transformed bacteria④Ligation of the fragment into a new plasmid vector

DNA molecules can be cut into sections by using:

Bacteria containing recombinant plasmids are often identified by which process?

There are two kinds of DNA libraries, they are _____ libraries and _____ libraries。

A. a vehicle for the insertion of recombinant DNA into bacteria.
B. surfaces for respiratory processes in bacteria.
C. recognition sites on recombinant DNA strands.
D. surfaces for protein synthesis in eukaryotic recombinants.
E. proviruses incorporated into the host DNA

There are two kinds of DNA libraries, they are _ libraries and _ libraries。