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Question: Answered & Verified by Expert
In bacteria, the restriction enzyme plays an important role in defence against viral infection by chopping foreign DNA into pieces, but it does not cut its own DNA because of
BiologyBiotechnology - Principles and ProcessesNEET
Options:
  • A difference in recognition sequence.
  • B methylation of A or C at the recognition site.
  • C restriction endonuclease leave the DNA out of the cells.
  • D none of these.
Solution:
1576 Upvotes Verified Answer
The correct answer is: methylation of A or C at the recognition site.
The methylation of adenine or cytosine at the recognition sequence of the DNA protects it from restriction endonuclease.

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