Handout 10 Flashcards
(13 cards)
surrounds the genome of a virus?
capsid! capsule for bacteria
cellular or acellular?
acellular= no cytoplasm and no organelles.
no metabolic- steal that from the host
extracellular form of a virus?
virion
nucleocapsid contents
DNA or RNA
structural protein
enzymes and nucleic acid binding proteins
nucleocapsid may be the outer structure if naked
what’s the outer structure if the virus is nakie?
nucleocapsid
covered with plasma and spikes otherwise.
what viral proteins project out of the membrane for attachment?
VAPS, peplormers and spikes
what is the nucleocapsid structure?
it has capsomers.
helical or icosahedral forms
bacteriphages have additional structures attached to their head
what VAP does influence have?
HA = hemaggluttinin
are naked or enveloped more resistant to acids?
naked! envelope has a plasma- lipid- membrne so it needs moisture . acids are more resistant to drying and spread more easily.
where do DNA viruses replicate vs. RNA viruses?
DNA in the NUCELUS and RNA in the cytoplasm. (except for AIDS?)
what does TROPISM mean?
host cell type specificity. “looking for their trophy host”
example of Hep C is hepatotrophic
early phase vs. late phase
early= enzymes. PROTEINS needed for REPLICATION! enzymes late= capsid strcutres
why is it hard for RNA to make eukaryotic ribosomes?
viruses have POLY (they’re sluts)
and the eukaryotes have MONO
so they will make mono mRNA
host splicing to cleave the viral mRNA
