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| one of the first to study viruses in depth |
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| iwonowski believed a 'filterable virus' must cause |
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| later in the 1890's, Beijerink repeated the work of Iwanowski and called the infectious agent a "_" |
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| due to EM in the 1940's scientists could see the viruses |
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Different virus shapes H (coil) I (triangular faces) etc... |
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| viruses that attack bacteria are |
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| classified in three forms: H, I, C |
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| helical, icosahedral, complex |
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components of viruses NA PC EE |
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Virus consists of core of ncleic acid, protein covering, and sometime enclosing envelope with spikes |
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| the outer protein coat of a virus |
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| a genome is... and consists of... or.... |
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| the nucelic acid core of the virus, and consists of DNA or RNA |
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| a capsid is formed from smaller protein units called... |
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| the combo of ... and ... is known as nucelocapsid |
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| enclosing structure similar to the membrane that encloses a cell, sometimes envelope has spikes that help virus contact host cell |
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Stages of Virus replication A P S A R |
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Attachment- finding the right host cell Penetration stage – getting the genome inside Synthesis stage – production of viral parts Assembly stage – formation of viral particles Release stage – new viruses emerge from cell |
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| protein molecules synthesized by the immune system in response to the prescence of viruses |
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AZT-- interferon (potential) |
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ultra-microscopic, single stranded molecules of RNA without protein coat infect plants |
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| prions names by .... who won the Nobel Prize |
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Cancer.. hep b causes.. hpv causes... ebv causes... |
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liver cancer cervical cancer burkitt's lymphoma (tumor) |
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| virus stays in host cell cytoplasm and fails to replicate or destroy |
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| virus replicates within host cell and destroys |
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