In the days when epidemics were raging, we all tended to be more interested in pathogens, namely bacteria and viruses. Bacteria and protozoa in general are familiar to us in high school, but the virus is not mentioned much. So hopefully the following article will help you understand a little more about these “living bug” entities.
Viruses are one of the most diverse biological entities in nature. However, up to now, although there are still millions of different types of virus, we have only recorded 5000 types. One of the biggest difficulties in studying viruses is that they are so small and most viruses cannot be seen with an optical microscope.
Virus is extremely simple structure, including 2 to 3 main parts as follows:
- The genetic material is made up of DNA or RNA, which are long molecules carrying genetic information. A protein crust – called the capsid – is responsible for protecting the genome; and in some cases a section (3). An outer layer made of lipids that envelop the protein shell when the virus is outside the cell.
There has been much debate among scientists about whether the virus can be considered a living form. It has no cellular structure (the most basic unit of life) but has the ability to genetically, reproduce and evolve according to natural selection processes. It has some basic characteristics of life but is not complete. So they are considered “creatures on the margins of life”. Basically they are not really alive, they are just an entity that exists with life.