What is virus and explain its structure?

Answer 1

Virus is Latin word which means "POISON". They are of different shapes, some are rounded, rod-shaped, and polyhedral and some are like tadpoles. STRUCTURE:Structurally viruses are not cellular but are made up of nucleic acid and proteins. They have to parts, an outer "coat" and inner "core". The coat is made up of proteins and core is made up of DNA or RNA. AWAIS AHMED awais94_2005@Yahoo.com Pakistan INTERNATIONAL SCHOOL JEDDAH

Answer 2

A simple DNA virus, Genetic material surrounded by a protein coat called a capsid that may, or may not be shaped into landing on bacteria/cellular struts.

Retroviruses can be more complex. The HIV virus has genetic material. two reverse transcriptase enzymes, the protein capsid and then a membrane acquired on exit from the invaded cell which is studded with glycoproteins.

Answer 3

Viruses are very complexed 'things'. I call them things because although they are technically alive, the show none of the signs of the life.

A virus is basically a ball of protein which encases the viruses strand of RNA or DNA. On the surface of a virus is its antigens which act as identification. (these are how the immune system recognises them as foreign)

A virus reproduces by taking of a cell of the host organism, injecting its DNA or RNA strand which overrides the hosts, and basically turning the cell into a virus making factory. The viruses DNA tells the cell to create virus cell after virus cell until the viruses burst out of the cell and invade others around the body.

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Answer 4

A virus is a microscopic infectious agent that can only replicate inside the cells of living organisms. It is made up of genetic material (DNA or RNA) surrounded by a protein coat called a capsid. Some viruses also have an outer lipid envelope derived from the host cell membrane.