Viruses in the external environment are in the form of crystals; these are organisms that do not have a cellular structure. Bacteriophages are viruses that infect bacteria. How do bacteriophages enter bacterial cells?
1) the tail processes attach to the antigenic proteins of the bacterial cell wall;
2) the tail enzyme destroys the bacterial cell wall;
3) the DNA of the virus is injected into the cell through the tail channel;
4) DNA replication and synthesis of cell proteins are suppressed, instead of them DNA and virus proteins are synthesized.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.