Q. When viruses attack the bacteria, it in turn protect itself by fragmenting viral DNA with
Solution:
- Endonucleases are enzymes that cleave the phosphodiester bond within a polynucleotide chain.
- Some, such as deoxyribonuclease I, cut DNA relatively nonspecifically without regard to sequence.
- Many, typically called restriction endonucleases or restriction enzymes, cleave only at very specific nucleotide sequences.
- Endonucleases differ from exonucleases, which cleave the ends of recognition sequences instead of the middle (endo) portion.
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