Prions,Viroids,Virus Word Scramble
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| Question | Answer |
| Prions, Viroids, Viruses | missing link btwn non-living & living b/c don't have all characteristics of living; lack ability to reproduce on their own; are infectious agents & reproduce inside host cells; obligate intracellular parasite |
| Prions | proteins, smallest disease agent; linked to Creutzfeld-Jakob Disease (mental degeneration), Kuru-Canabalism; Bovine Spongiferous Encephalitis (Mad Cow Disease); Scrapie (Sheep Disease) |
| Prions | Creutzfeld-Jakob Disease |
| Creutzfeld-Jakob Disease | Mental Degeneration |
| Prions | Kuru |
| Kuru | Cannibalism |
| Prions | Bovine Spongiferous Encephalitis |
| Bovine Spongiferous Encephalitis | Mad Cow Disease |
| Prions | Scrapie |
| Scrapie | Sheep Disease |
| Prusiner | 1997 Nobel prize - Scrapie |
| Viroid | made up of RNA; causes only plant diseases |
| Viruses | made up of at least capside (protien) & 1 of 4 kinds of Nucleic Acid |
| 4 kinds of Nucleic Acid | Double Stranded DNA & RNA, Single Stranded DNA &RNA |
| Viruses | some contain envelope |
| Viruses | Are genetic parasites |
| Genetic parasites | Depend on host metabolism for reproduction |
| Polio virus | only virus capable of reproduction w/o intact host cells |
| Venter | 2003; synthesized 'A' phage (bacterial virus) |
| Smallest Virus | Enteroviruses 30nm |
| Largest virus | Orthopox 300nm |
| Shape of Viruses | Helical, polyhedral - iscosa hedral, Complex - bullet shaped; Spherical - enveloped |
| 1st virus to be indentified | Tobacco Mosaic Virus (TMV) |
| TMV | filterable agent |
| Beijerinck (1899) | characterized them as infectious |
| Stanley (1935) | crystallized TMV; 1st observed virus TMV |
| viral replication | lytic & lysogenic cycles in phages |
Created by:
JYarger
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