Viruses that infect bacterimal multiplication and cause their lysis, are called

Step-by-step solution

When bacteriophage infects a bacterium, it entirely depends on the host for its multiplication. It utilises the host machinery for replication and produce a large number of progeny phage particles. The bacterium cell undergoes lysis and dies to liberate a large number of these phage particles, which are each ready to start another cycle by infecting new bacterial cell. This cycle is known as lytic cycle.