Question

Write down the five salient feature of virus

Answer 1

Viruses are non-cellular organisms, which made up of genetic material and protein that can invade living cells. These micro organisms belong to the family of viridae and Genus of virus.

A virus is non-cellular organisms made up of genetic material and protein that can invade living cells. They are considered both a living and non living things. In the year 1897, a scientist named Beijerinck discovered and coined the term virus. The term virus is derived from Latin word-“virus” means poison. Later in the year 1935, a scientist named Wendell Stanley discovered that these viruses are composed of nucleic acids, protein and lips. The study of viruses is called as virology.

Viruses are very small and they measured in nanometers. They can only be seen with an electron microscope. They are composed of a core of DNA or RNA surrounded by a protein coat they can only reproduce by infecting living cells. Their size ranges from 20 nanometers to 250 nanometers.

Answer 2

$\textbf{Virus}$:

They are submicrobes that have the characteristics of both living and non-living things.

For Example, TMV, FMDV etc.

$\textbf{Features}$:

1. They inhibit and reproduce only inside the cells of living organisms.

2. They obtain thier food from the host cells.

3. They are smaller that the smallest known cell.

4. They are visible by electron microscope only.

5. They are of various shape like- spherical, rod shaped, etc.