Positive-sense RNA viruses have RNA that can be immediately used for protein synthesis, while negative-sense RNA viruses must first convert their RNA to positive-sense RNA.
Attachment, Penetration, Uncoating, and Budding.
As either enveloped or naked
Capsomers
Interaction between viral attachment proteins (VAPs) of the virus and host cell receptor sites.
Viral-specific glycoproteins and host-cell-derived lipids and lipoproteins
Capsid
<p>More durable and can survive outside the host</p>
RNA polymerase.
The ability of RNA viruses to function as mRNA, determining if the viral RNA can be immediately used for protein synthesis by the host cell machinery.
Envelope
DNA or RNA
Double-stranded RNA.
<p>Protects the viral genome, site for receptors necessary for infection (for naked viruses), and stimulates antibody production.</p>
<p>Have a lipid membrane from the host cell and are sensitive to environmental conditions</p>
<p>Helical, icosahedral, and prolate. </p>
<p>Viruses fuse their envelope to the plasma membrane and enter the cell by endocytosis (Viropexis). </p>
<p>Separation of the capsid from the viral genome.</p>
<p>Naked viruses. </p>
<p>The virus is release by lysis or by budding out of cell membrane (if the virus is enveloped).</p>
