IMMUNOLOGY

Detailed explanation-1: -In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.

Detailed explanation-2: -A virus needs a living cell in order to reproduce. The living cell in which the virus reproduces is called a host cell.

Detailed explanation-3: -A virus cannot replicate alone; instead, it must infect cells and use components of the host cell to make copies of itself. Often, a virus ends up killing the host cell in the process, causing damage to the host organism. Well-known examples of viruses causing human disease include AIDS, COVID-19, measles and smallpox.

Detailed explanation-4: -They are incapable of surviving independently and require a host to conduct their life processes. They are parasitic in nature and require the host to provide energy and replicate.