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| characteristics of viruses |
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Definition
| contain a nucleic acid, protein coate and sometimes and envelope with spikes; obligatory intracellular parasides |
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| protein coat surrounding the nucleic acid, made of capsomeres |
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| capsids are hollow cylinders surrounding the nucleic acid |
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| many sided; usually the capsid is an icosahedron (20 identical trianges, 30 edges, and 12 vertices) |
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Definition
| covered by an envelope; example had a helical capsid inside |
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Definition
| polyhedral capsid, helical tail by bae plate and tail fibers and pin |
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| group of viruses sharing the same genetic information and ecological niche (host); subspecies designated by a number |
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| bacteriophages destory bacteria leaving a clear area on the plate; concentration of viruses is given as plaque-foring units |
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| in a culture media to detec cytopathic effects or tumor cells; in a chicken egg |
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| serological tests, cytopathid effects, DNA probe to look at nucleic acids |
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Definition
| attachment, penetration (by lysozyme), biosynthesis, maturation, and release |
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| viral DNA incorporated into the host; can remain stable or change to lytic cycle (can be induced in lab) |
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| no viral count because all undergoing biosynthesis and maturation |
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Definition
| attachment, penetration by endocytosis of fission, UNCOATING, biosynthesis, maturation, and release by budding or rupture. |
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