BACTERIOPHAGES
What are Bacteriophages?
Bacteriophages, or phages, are viruses that infect only bacterial cells. They are abundant and diverse in size and structure.
They consist of genetic material encased in a protein shell. Phages use Brownian motion to reach their targets since they are not motile.
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Phages are specific to certain bacterial hosts and may have two replication strategies: lytic or lysogenic.
In the lytic cycle, they attach to a host cell, use its resources to make new phages, and then destroy the cell to release the new phages.
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In the lysogenic cycle, the phage’s genetic material integrates into the host cell’s chromosome without killing it. This integrated form is called a prophage and can later switch to the lytic cycle under certain conditions.
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