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Virus Module Set 9
Question | Answer |
---|---|
cancer-causing virus mechanism: carry | oncogene into cell and insert it into host genome |
cancer-causing virus mechanism: altered | cell regulation due to changes in kinase activity or production of regulatory proteins |
cancer-causing virus mechanism: insertion of | promoter or enhancer next to cellular oncogene |
viroids: | infectious agents composed only of circular ssRNA |
prions: | infectious agent thought to be composed only of protein |
viroids DO NOT... | act as mRNA molecules |
viroids can... | cause disease in plants |
plant disease-inducing viroids... | mechanism unknown and some cause latent infections |
viroids RNA may... | be replicated by rolling-circle method using host RNA polymerase |
prions: | cause degenerative diseases in animals |
animal degenerative diseases: | scrapie, bovine spongiform encephalopathy, Creutzfeldt-Jakob disease |
in prions, it's currently thought that... | PrP (prion protein) is present in “normal” form in host animal |
for animals, exposure to... | altered PrP thought to cause disease |