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Viruses

Viruses - Term Definition What is a virus Infectious...

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Term: What is a virus? Definition: Infectious particle, protein + nucleic acid,obliqate intracellular pathogen Term: What r the parts of the virus? Definition: Nucleic acid (DNA or RNA), capsid (encloses nucleic acid) envelop ( lipid bilateral or naked) and glycoproteins ( involved in attachment). Term: Poxviruses Definition: Largest of the virus , 300 nm Term: Enteroviruses Definition: Smallest viruses < 30 nm Term: Name the 5 different shapes of viruses? Definition: Helical, polyhedral,icosahedral, complex and bullet shaped.
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Term: Complex virus have these three things? Definition: Elaborate capsid, complex shape and specialized structures Term: Define host range Definition: What organism the virus can infect Term: Viral specificity Definition: What cells the virus can infect which will depend on the receptors and cellular enzymes. Term: What r the 3 possible origins of viruses? Definition: Evolved with cells ( occurred at the same time) , reversed evolution ( virus was a simple bacteria which lost ) Term: How r viruses classifed? Definition: Organism infected, tissue/cell infected, nucleic acid, replication, family,genus, species.
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Term: What committee chooses names of viruses? Definition: International committee on Taxomy of viruses Term: What is the hierarchical classification of viruses?
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