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Restriction endonucleases...

Restriction endonucleases

A

Are used for in vitro DNA synthesis

B

Are synthesized by bacteria as part of defense mechanism

C

Are present in mammalian cells for degradation of DNA when the cells dies

D

Are used in genetic engineering for ligating two DNA molecules

Text Solution

Verified by Experts

The correct Answer is:
B
Restriction enzyme cleaves DNA into fragments at or near specific recognition site. These enzymes are found in bacteria and archaea and provide defense mechanism against invading virus.
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