Bacterias use for cutting DNA of viruses that invade them.
A
restriction enzymes
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B
DNA ligase
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C
DNA polymerase
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Solution
The correct option is A restriction enzymes Bacterias use restriction enzymes for their own protection. The viruses which invade the bacteria (bacteriophages) are acted upon by these restriction enzymes. These enzymes cut the viral DNA into pieces so that viral replication is prevented.