What is the use of restriction endonuclease inside the host bacterial cell?

Dear student.

Restriction endonuclease protects a bacteria from the attack of bacteriophages. There are restriction sites present in the genome of bacteriophage, which can be cleaved by the restriction endonuclease of bacteria. This destroys the DNA of bacteriophage, as a result of which bacteriophage will not be able to kill a bacterial cell.


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