NEET BIOLOGY

Detailed explanation-1: -Viruses may also change cellular transcriptional activity, and protein-protein interactions, promoting efficient production of progeny virus. For some viruses, specific cellular biochemical functions may be stimulated in order to enhance virus replication.

Detailed explanation-2: -A virus makes copies of itself to spread They survive in the cells of living things, which are called host cells. When a virus gets into a host cell, it starts to make copies of itself. Then the virus, along with the new copies, exits the host cell and goes on to attack other host cells.

Detailed explanation-3: -The virus can do this because viruses and cells have an important thing in common: they both use DNA and RNA. DNA and RNA are molecules that act like instructions. Viruses bring their DNA and RNA instructions to the cell, and trick the cell into following them.

Detailed explanation-4: -Viruses undergo evolution and natural selection, just like cell-based life, and most of them evolve rapidly. When two viruses infect a cell at the same time, they may swap genetic material to make new, “mixed” viruses with unique properties. For example, flu strains can arise this way.