Do eukaryotic cells have restriction endonucleases? Justify your answer.

(N/A) No,eukaryotic cells do not possess restriction endonucleases. In eukaryotic cells,the $DNA$ is heavily methylated by specific enzymes known as methylases. This methylation process serves as a protective mechanism,preventing the $DNA$ from being cleaved by restriction enzymes. Restriction endonucleases are naturally occurring enzymes found exclusively in various strains of bacteria or prokaryotic cells,where they function as part of a defense mechanism against invading viral $DNA$.