Role of Restriction Enzymes

Question: Discuss the role of restriction enzymes as a defense mechanism by bacteria. Answer: Restriction modification system can be considered as the primitive immune system of bacteria and due to the diversity and prevalence across the prokaryotic system helps in increasing the effectiveness of defense mechanism against the other genomes. There are mainly two type of restriction enzymes are involved in this particular case of modification one is endonuclease and another is methyltransferase (A collection of tRNA, 5S and 5.8S rRNA and restriction enzyme recognition site sequences, 1984). The endonuclease plays an important role in introducing double standard DNA and reliable recognition has been carried out regarding the restriction sites. However, thus particular developed genome phase is not able to complete its lifecycle, the methyltransferase enzyme helps in protecting the host cell, and depending upon the endonuclease different specific activities, the categorization has been done (A collection of tRNA, 5S and 5.8S rRNA small RNA and restriction enzyme recognition site sequences, 1985). References A collection of tRNA, 5S and 5.8S rRNA and restriction enzyme recognition site sequences. (1984). Oxford. A collection of tRNA, 5S and 5.8S rRNA small RNA and restriction enzyme recognition site sequences. (1985). Oxford.