I'm just curious about this since both prokaryotes and eukaryotes have DNA
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It just never happened in bacteria's evolutionary history to create a nucleus to protect its DNA.
Eukaryotic cells have a nucleus to protect its DNA, but bacteria have their own defense mechanisms as well. A big natural killer of bacteria is Bacteriophages (viruses that only infect bacteria). Viruses kill a cell by injecting their genetic material into a host cell, hijacking its nutrients and enzymes and converting it into a "virus factory." Bacteria have "Restriction Endonucleases" to protect itself; reactive enzymes that are designed to recognize, bind to and destroy invading viruses DNA.
Eukaryotic cells have a nucleus to protect its DNA, but bacteria have their own defense mechanisms as well. A big natural killer of bacteria is Bacteriophages (viruses that only infect bacteria). Viruses kill a cell by injecting their genetic material into a host cell, hijacking its nutrients and enzymes and converting it into a "virus factory." Bacteria have "Restriction Endonucleases" to protect itself; reactive enzymes that are designed to recognize, bind to and destroy invading viruses DNA.
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It is a prokaryotic cell