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PHMY 610 VIROLOGY TEST QUESTIONS AND ANSWERS
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PHMY 610 VIROLOGY TEST QUESTIONS AND ANSWERS...
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PHMY 610 VIROLOGY TEST QUESTIONSAND ANSWERS
what are all viruses considered
parasites
what are the three key components of viral structure
the capsid, envelope vs non-envelope, segmented vs non-segmented
where is viral DNA/RNA housed
capsid
what are some examples of enveloped viruses
influenza, HIV, RSV
what are two examples of non-enveloped viruses
norovirus, rhinovirus
what is the envelope made of
phospholipid bilayer
is the envelope interior or exterior to the capsid
exterior
T/F: Attachment proteins or spikes (E-proteins) found in enveloped viruses
true
enveloped viruses typically (more/less) virulent than non-eneveloped
less
why are enveloped viruses less virulent
, enveloped viruses more sensitive to environmental changes & enveloped
viruses do not cause cell lysis upon exit of host cell
what type of immunity is responsible for immune response with enveloped
viruses
cell mediated (T cells)
what type of immunity is responsible for immune response with non-enveloped
viruses
humoral immunity (B cells)
are enveloped or non enveloped viruses MORE sensitive to pH changes, heat,
and simple disinfectants
enveloped viruses
how do enveloped viruses enter and exit the cell
Enveloped viruses fuse with outer membrane of cell for entry due to lipid
bilayer of the envelope and use budding to exit the cell (uses host membrane)
do non enveloped or enveloped viruses take the host cell membrane with them
enveloped
T/F: enveloped viruses cause cell lysis immediately after leaving the cell
false, do not cause lysis immediately
how do non enveloped viruses enter and exit the cell
Non-enveloped viruses penetrate through the membrane of the cell and exit the
cell through cell lysis
what does it mean to say a virus has segmented RNA/DNA
contain more than one RNA/DNA molecule
T/F: non-segmented viruses often the ones causing pandemics due to mutations
and ease of sharing
false, segmented viruses
what are bacteriophages
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