Question

Why are viruses and prions excluded from the three domains of life?

Answer 1

Prions and viruses:

1. The name "prions" refers to abnormal, pathogenic organisms that can spread and are capable of causing specific, normal cellular proteins known as prion proteins, which are most prevalent in the brain, to fold abnormally.
2. A virus is a submicroscopic infectious agent that can only reproduce inside of another living thing. They have a capsid-encased DNA or RNA strand.
3. It spreads to all living things, including plants, animals, and bacteria.
4. Viruses come in more than 9000 different species, according to research.
5. They have a capsid-encased DNA or RNA strand.
6. Prions and viruses are not regarded as living things because they fall short of a few key requirements for life.
7. For instance, viruses and prions do not contain cells and do not have an energy metabolism system.
8. They lack any cell organelles, hence they are unable to carry out any type of metabolic activity.