The virus deletes files and corrupts essential core microchips. A virus is a small infectious agent that can only replicate inside the cells of another organism. A virus is an infectious microbe consisting of a segment of nucleic acid (either dna or rna) surrounded by a protein coat.
A virus has either a dna or an rna genome and is called a dna virus or an rna virus, respectively. In this article, you will learn about what is virus in biology, characteristics of virus, its. Virus, infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.
Typically, viruses cause an immune response in the host, and this kills the. Viruses possess unique infective properties and thus. A virus is a small piece of genetic information in a “carrying case” — a protective coating called a capsid. A virus, at its core, is a tiny particle—usually between 20 and 300 nanometers in diameter—consisting of genetic material encased in a protective shell.
Some rna viruses, for example retroviruses, have a stage in their replication. Viruses aren’t made up of cells, so they don’t have all the equipment that cells do to. A virus cannot replicate alone; A computer virus may lurk unseen in a computer's memory, calling up and infecting each of the machine's data files in turn.
In humans, viruses can cause many diseases. For example, the flu is caused by the influenza virus.