Question

write the structure of virus.​

Answer 1

Viruses are small obligate intracellular parasites, which by definition contain either a RNA or DNA genome surrounded by a protective, virus-coded protein coat. Viruses may be viewed as mobile genetic elements, most probably of cellular origin and characterized by a long co-evolution of virus and host. For propagation viruses depend on specialized host cells supplying the complex metabolic and biosynthetic machinery of eukaryotic or prokaryotic cells. A complete virus particle is called a virion. The main function of the virion is to deliver its DNA or RNA genome into the host cell so that the genome can be expressed (transcribed and translated) by the host cell. The viral genome, often with associated basic proteins, is packaged inside a symmetric protein capsid. The nucleic acid-associated protein, called nucleoprotein, together with the genome, forms the nucleocapsid. In enveloped viruses, the nucleocapsid is surrounded by a lipid bilayer derived from the modified host cell membrane and studded with an outer layer of virus envelope glycoproteins.

Answer 2

Viruses

• viruses come in an amazing variety of shapes and sizes .they are too small and are measured by nanometer which is one billionth of a metre .

Virus structure

• The basic structure of a virus is made up of genetic information molecules and protein layer that protects that information molecule.the arrangement of the protein layer and the genetic information comes in a varieties of presentations.
• The core of virus is made up of nucleic acids ,which then make up the genetic information in the form of RNA or DNA. The protein layer that surrounds and protect the nuclei is called capsids .
• main single virus is in its complete form and has reached full infectivity outside of the cell it is known as virison. A virus structure can be of the following:envelop,complex,helical or icosahedral.

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