Two modes of multiplication cycle in Bacteriophages namely lytic cycle and lysogenic cycle.
Lytic cycle :
Lytic cycle or lytic phages called as Virulent phages. Multiples inside the host bacterium and new viral particles comes out by lysing or by rupturing the host bacterial cell wall.
Example: T phages, T2, T4, T6 etc…
Lysogenic cycle :
Lysogenic cycle or lysogenic phages called as temperate phages. It does not undergo multiplication or induce lysis, here the viral DNA get integrated into the bacterial DNA without causing lysis.
Example: Lambda phages.