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microbiology

virus information ch. 25

viruses (words and concepts)viruses (definitions)
virus an infectious agent made of a core of nucleic acid and a protein coat, no nucleus or other organelles
capsid the protein coar that surrounds the core of nucleic acid
nucleic acid may be... EITHER DNA or RNA, never both
envelope an additional protective coating made of lipids, proteins, or carbohydrates
envelopes are found... ONLY on viruses that infect animal cells
virulent viruses destructive, cause disease
temperate viruses effects may not be seen, dormant
viruses don't reproduce, they... replicate!
host organism that shelters and nourishes
process steps: attatchment, penetration, replication, synthesis, assembly, release.
lytic cycle viral replication process proceeds rapidly and kills host
lysogenic cycle virus does not immediately kill host
stimulus causes viral DNA to splice
filoviruses, polyhedral, helical, and binal are all examples of classifying viruses by... shape.
a bacteria host for a virus is called a(n) bacteriophage
retrovirus RNA reverse transcribes into DNA
viroids PLANTS ONLY, tightly folded strands or circles of RNA
prions ANIMALS ONLY, small, naked strands of proteins
vaccines/vaccination viruses used against themselves injected into a person
genetic engineering manipulating the genes of an organism (gene therapy)
virologist person who studies viruses
interferon protein produced in small amounts by certain human cells to "interfere" with viral activities
Created by: kayjay43
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