Final answer:
Viruses destroy host cell's DNA by attaching to specific receptor sites on the cell's surface, replicating their genetic material, and disrupting the cell membrane, leading to cell lysis.
Step-by-step explanation:
When viruses infect cells, they often cause damage that may include lysis of the host cells. Viruses attach to specific receptor sites on the host cell's surface to gain entry. Once inside, the virus replicates its genetic material and produces its own proteins. As the new viruses assemble, they can disrupt the host cell's membrane, leading to cell lysis and ultimately destroying the host cell.