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Q.

Which of the following is an incorrect statement?

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a

After digestion with restriction enzymes, the DNA fragments can be prevented from self-ligation by treating with alkaline phosphatase.

b

Chemical knives of DNA are endonucleases.

c

A chimeric DNA is a recombinant DNA generated by ligating segments from different sources.

d

The method in which bacterial cells take up DNA from their surrounding after a heat shock is called microinjection.

answer is D.

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Detailed Solution

To introduce alien DNA into host cells, recombinant DNA is directly injected into the nucleus of an animal cell through micro-injection.

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