BIO chapter 7 viruses

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Author:
elevatedsound7
ID:
198400
Filename:
BIO chapter 7 viruses
Updated:
2013-02-11 16:42:02
Tags:
viruses
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Description:
viruses
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  1. genetic element with an extra cellular state that requires a host cell to replicate, doesn't need genetic material to replicate =
    virus
  2. virus without an envelope =
    naked virus
  3. same virus can casue what
    multiple diseases
  4. all viruses have what as covering
    • capsid
    • may or may not have envelope
  5. the more enzymes a virus has the more=
    pathogenic it is
  6. viruses categorized by
    • The type of nucleic acid it has
    • DNA = single, double
    • RNA = single, double
  7. bacteriophage =
    virus that infects and replicates within bacteria
  8. nucelocapsid = 
    the capsid and nucleic acid together
  9. nucleic acid + scaffolding =
    viral core
  10. why can't viruses live outside of host
    they have no metabolic capabilities
  11. what does body do when a virus has an envelope
    produce antibodies
  12. viral enzymes are found where
    in the nucleocapsid
  13. what is the virus infectious cycle
    • adsorption
    • penetration
    • uncoating
    • synthesis
    • assembly
    • release
  14. adsorption =
    specific attachment of virus
  15. penetration =
    entry of viral genome
  16. uncoating =
    release of viral genome
  17. synthesis=
    new viral products made
  18. assembly =
    new viruses are made in the cell
  19. release =
    often causes the host cell to lyse
  20. what three ways viruses are detected in the lab
    • using live animal inoculation
    • using bird embryos
    • using cell (tissue) cultures
  21. 5 different things that can happen to a cell as a result of viral infection
    • death to host cell
    • proliferation of cells
    • fusion
    • transformation
    • no change
  22. viroids =
    • plant pathogens
    • naked RNA
  23. prions =
    • not a living organism
    • defectively folded host protein
    • casues¬†"spongiform encephalopathy"
    • ie MAD COW DISEASE
    • "slow viruses"

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