Central core of nucleic acid of a virus is called genome and the protein coat surrounding is called as capsid. Viruses usually have either dna or rna whereas the typical cell contains both dna and rna.
Replication of a dna virus is shown in 1.
Structure of virus notes. Thus with respect to nucleic acid the viruses are of three types. The structure of a viruses genome determines how it will replicate and this is the basis of the baltimore classification. The life cycle of the virus is a series of steps that enable the virus to infect a host and replicate itself.
A virus particle consists of dna or rna within a protective protein coat called a capsid. For the release of new viral particles any of a number of processes may occur. In some virus an envelope made up of glycoprotein and phospholipid bilayer is present outside the capsid.
A basic structure of virus is nucleic acid core either dna or rna but not both surrounded by protein coat. Virus has a covering that has a capsid and sometimes an envelope inner core contains a nucleic acid molecule dna or rna and various proteins. A virus is an infectious non living particle that cannot survive on its own.
It is first divided in two depending on how the virus replicates. Rous sarcoma virus rsv have both dna and rna. Replication of an rna virus is displayed in 2.
The figure below is the basis of this classification. See video on how a virus invades your body npr lytic cycle reproduction occurs cells burst. Explore virus structure structure of virus viral structure types and functions of virus structure.
With or without reverse transcriptase. The shape of the capsid may vary from one type of virus to another. Viruses are usually very specific to their host and to the cells they can infect.
The nucleoprotein np associates with the viral rna to form a ribonucleoprotein rnp which is a structure of 9 mm in diameter that assumes a helical configuration and forms the viral nucleocapsid. The capsid is made from the proteins that are encoded by viral genes within their genome. Certain animal viruses e g.
The virus is core consists of ribonucleoprotien in helical symmetry. For example the host cell may be biochemically exhausted and it may disintegrate thereby releasing the virions. Viruses vary in their structure.
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