Final answer:
The host DNA is usually degraded during the biosynthesis stage of viral infection.
Step-by-step explanation:
The host DNA is usually degraded during the biosynthesis stage of viral infection. After entering the host cell, the virus synthesizes virus-encoded endonucleases to degrade the bacterial chromosome. This allows the virus to hijack the host cell and replicate, transcribe, and translate the necessary viral components. During the maturation phase, new virions are created. To release these virions, the bacterial cell wall is disrupted by phage proteins such as holin or lysozyme, resulting in the destruction of the host cell and the liberation of the progeny viruses.