A basic virus is composed of a genome, capsid and viral envelope. Viruses are acellular, non-living organisms. They are classified as obligate intracellular parasites, which require a host organism to function.Continue Reading
The genome of a virus is all of its genetic material. Viruses can either have DNA-based genetic material or RNA-based genetic material. Their nucleic acids can be single or double stranded.
Viruses also contain capsids, which are proteins that coat and protect the nucleic acids within the virus. Some viruses contain outer viral envelopes composed of lipids, carbohydrates and proteins to protect the entire virion. The Influenza virus is an example of an envelope virus.Learn more about Biology
A virus particle is not a complete cell but an intracellular parasite. Hence, it cannot reproduce without the help of a host cell. Once inside a host cell, the virus is made in such a way that it replicates itself. There are two ways in which viruses reproduce or multiply their numbers: the lytic cycle and the lysogenic cycle.Full Answer >
There are three primary virus shapes, including a polyhedral shape, a helical shape and a complex virus shape. The polyhedral shape is like a dodecahedron with 12 sides, the helical shape is like a tube and the complex shape has long legs and a geometric head.Full Answer >
The fatal Ebola virus is wide spread in East Africa, it is caused by the RNA virus and its symptoms are similar to other viral infections. Bleeding occurs during the later stages and it can be transmitted from animals to humans.Full Answer >
The smallest virus as of 2014 belongs to a group of viruses known as parvoviruses. These spherical viruses are about 18 nanometers in diameter and can only be seen through an electron microscope. To put that size in perspective, one nanometer is one-billionth of a meter.Full Answer >