Definition of Lysogenic Cycle

Lysogenic cycle is the growth cycle of a phage which is also known as temperate and non-virulent infection. In this cycle, the virus does not kill the cell of the host (bacterium), but takes it as a refuge and remains there in the dormant condition. The phage injects its DNA into the host and incorporates into the genome of the host with the aid of an enzyme called integrase and is then becomes a prophage.


The genome of the prophage then replicates as the host cell divides but does not produce viral proteins that are necessary for the production of progeny. The cell of the host remains unaffected by the genome of the phage as the size of its genome is very small as compared to that of the host.

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