What is a Virus? Flashcards
what is a virus
submicroscopic infectious agents that are inert while outside the host
what type of parasite are viruses
obligate
what do viruses need to multiply
a host cell
define submicroscopic
below the resolution of an optical microscope – need an electron microscope to see a virus
define inert
not biologically active
what is the protein shell that protects the nucleic acids of the virus
viral capsid
what can often be found on the capsid of a virus
epitopes
what is the lipid bilayer of a virus that is always derived from the host cell
envelope
what are the large projections on the envelope of some viral families that are usually glycosylated proteins that can be seen by electron microscopy
peplomers
which type of viruses are more sensitive to disinfectants - enveloped or nonenveloped
enveloped
how are enveloped viruses more commonly transmitted
direct contact or vectors
what impacts how viruses behave and evolve
viral genome
what is the order of nomenclature for a virus
order
family
subfamily
genus
species
where do DNA viruses replicate
in the nucleus of the host cell
which DNA viruses do not replicate in the nucleus of the host cell
poxviruses
asfaviruses
true or false:
DNA viruses are quite species-specific
true
true or false:
DNA virus vaccines are often quite effective
true
which are the enveloped DNA viruses
Herpesviridae
Asfaviridae
Iridoviridae
what are the segmented & naked RNA viruses
picornaviridae
caliciviridae
astroviridae
reoviridae
what are the enveloped RNA viruses w/o peplomers
flaviviridae
togaviridae
arteriviridae
true or false:
RNA viruses evolve faster than DNA viruses
true
