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7 Cards in this Set

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  • Back
What does it mean when a virus is a (+) stranded RNA virus?
The RNA is just like mRNA - can immediately be translated by host ribosomes
What enzyme must (-) stranded RNA viruses carry in their capsid?
RNA-dependent RNA polymerase
What is a retrovirus?
Carries RNA, which is reverse transcribed into DNA by viral reverse transcriptase
List the DNA viruses?
(HHAPPPy): Parvoviridae, hepadnaviridae, papovaviridae, adenoviridae, herpesviridae, poxviridae
List the RNA viruses?
Picornaviridae, Caliciviridae, Reoviridae, Togaviridae, Coronaviridae, Orthomyxoviridae, Rhabdoviridae, Paramyxoviridae, Retroviridae
What are the 4 steps necessary for viral reproduction?
1. Adsorption/penetration
2. Uncoating of the virus
3. Synthesis and assembly of viral products
4. Release of virions from the host cell
What are the four possible host cell outcomes of viral infection?
1. Death
2. Transformation - infection can activate oncogenes
3. Latent infection - virus exists in sleeping state that can be reactivated
4. Chronic slow infection - with disease caused only after many years of indolent infection