Viruses are __Obligate parasites

Intracellular

Viruses are unique entities that fall between living and non-living organisms. They are composed of genetic material (DNA or RNA) surrounded by a protein coat known as a capsid. Some viruses also have an outer envelope derived from the host cell membrane.

The obligate parasitic nature of viruses means that they cannot replicate or complete their life cycle without infecting and utilizing the cellular machinery of a host organism. They are highly specific in their choice of host species and even target specific cell types within a host. For example, some viruses infect only bacteria (bacteriophages), while others infect plants, animals, or humans.

Because of their parasitic nature, viruses can cause a wide range of diseases in their host organisms, from mild infections to severe and life-threatening illnesses. Understanding the interactions between viruses and their hosts is crucial for developing effective antiviral therapies and vaccines to combat viral infections.