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38 Cards in this Set
- Front
- Back
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nonliving particle made up of nucleic acid and a protein coat or lipid protein coat
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virus
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a virus is not living because...
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no cytoplasm or organelles
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a virus cannot reproduce where?
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outside of a host cell
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protein coat that surrounds the virus
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capsid
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Some viruses have an envelope that surrounds the capsid. How is this formed?s
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formed from the hosts cell membrane or nuclear membrane
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a viral infection begins when..
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the virus enters the host cell
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the viral genome..
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takes over and tricks the cell into replicating
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must use enzymes and organelles in order to replicate
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obligate intercellular parasites
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viral DNA enters and attaches to host DNA - called
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provirus
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the____is replicated as the___is replicated
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viral dna
host dna |
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what is used to make viral proteins
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host
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viral RNA is injected into the host and serves as mRNA which is transcribed into___this is called
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proteins
retrovirus |
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viruses that infect bacteria
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bacteriophages
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viral replication that results in the destruction of the host cell and release of new viruses
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lyctic cycle
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viruses that replicate by the lyctic cycle are called..
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virulent
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destroy cells they infect
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virulent
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allows viruses to hide in their host for days, months, years...
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lysogenic cycle
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intermediate host that transfers a patogen or parasite to another organism
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vectors
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examples of vectors:
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humans, animals, mosquitos, ticks, fleas
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multiplies in the lung, travels through blood vessels in the skin (cause of __)
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cause of chicken pox and shingles
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symptoms of chicken pox or shingles:
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fever, skin rash
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how chicken pox and shingles spread
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direct contact with skin rash, through the air
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are shingles provirus?
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after recovery
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inflamation of the liver
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hepatitis
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how hepatitis spreads:
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contaminated food and water, needles, sexual contact
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uncontrolled growth of cells invades body
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cancer
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illness caused by new or reappearing infection, come from animals
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emerging disease
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protection from emerging disease:
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vaccination, drug therapy, vector control
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material from apathogen into a human or animal, to induce an immune response
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vaccination
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inactivated virus
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not able to replicate with a host
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attentuated virus:
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can't cause disease
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what happened to small pox?
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they found a vaccination
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smallest known particle that is able to replicate
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viroid
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structure of viroid:
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short, circular, single-stranded RNA, no capsid
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viroids effect on humans:
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they effect the food we eat
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infectious protein particles that do not have a genome
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prion
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prion diseases:
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scrapie, mad cow disease, kuru
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prions effect on humans:
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disenegrates brain, effects nerves
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