Here's why:
* Bacteriophages are viruses that infect bacteria. They have a protein coat (capsid) surrounding their genetic material (DNA or RNA).
* The phage attaches to the surface of the bacterium. This attachment is highly specific, often targeting certain receptors on the bacterial cell wall.
* The phage then injects its genetic material into the bacterium. This is similar to how a syringe injects liquid. The phage's tail fibers contract, driving a hollow tube through the bacterial cell wall and injecting the genetic material inside.
* The phage's capsid remains outside the bacterium.
Let me know if you'd like to know more about bacteriophages or the process of infection!
