viuses, viroids, and prions

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viuses, viroids, and prions
2012-11-02 19:47:46

exam 2
Show Answers:

  1. can viruses contain both DNA and RNA at the sametime?
    no either one or the other
  2. this is ddetermined by a specific host attatchment sites and cellular factors
    host range
  3. these normally infect only specific types of cells in one host
  4. these are known as obligatory intracellular parasites
  5. compared to bacteria and RBC how big is a virus?
    very, very small!
  6. ssubunits to capids are called?
  7. how do capsomeres the little bumps on the virus assemble
    spontaniously by the charges on them
  8. envelope are made out of what?
    what our cell membrane are made out of, they normally get it from us...they barrow it
  9. the robot looking viruses are known as
    complex viruses
  10. complex viruses put dna into a cell how?
    by injection
  11. where a phage attaches by a tail fibers to host cell is known as?
  12. where a phage lysozyme opens cell wall tail sheath contracts to force tail core and DNA into cell is called
  13. where production of phage DNA and proteins is known as
  14. the assembly of phage particles is known as
  15. where the phage lysozyme breaks cell wall is known as
  16. During the lytic cycle the viruses do what sequence
    attachment, penetrate, biosynthesis, maturation and release out of the cell, they take the cell over
  17. when a virus incororates inself inside of a cell what cycle is this?
    lysogenic cycle
  18. during the lysogentic cycle where the viruses recombinant into the DNA what is this called
  19. the lytic cycle can cause what to the host cell?
    damage it can cause it to rupture
  20. During the lytic cycle where it is infected and happens to pick up some of the host DNA information and then break out of the cell to then be injected into another cell this is called? injection is just bacteria information
    generalized transduction, associated with the lytic cycle
  21. When the bacteria is in a lysogenic phase where it has a prophage in it that seperates from the chromosomes and starts making viruses again this is called?
    Specialized transduction
  22. How do bacteriophages get nucleotides and amino acids if they don't have any metabolic enzymes?
    From the cell they took over
  23. Vibrio cholerae produces toxin and is capable of causing Cholera only when it is lysogenic, What does this mean?
    It has been infected by the virus and the virus has incorporated itself into the chromosome
  24. How do animal viruses penetrate the cell?
    pinocytosis and fusion
  25. The extra step in animal viruses and not in bacteriophages is?
  26. When animal viruses go through the budding process how does it know to get out?
    by viral proteins along the cell membrane
  27. DNA virses generally heads where?
    straight to the cells nucleus
  28. In DNA viruses the capsules will assemble where?
    in the nucleus
  29. Where does a RNA viruses assemble and replicate in a cell?
  30. What  enzyme do you need to make RNA?
    RNA polymerse
  31. Dies RNA viruses depend on DNA
    no they depend on RNA for RNA replication
  32. reverse transcriptase is from what kind of virus and what is happing?
    retrovirus and it takes RNA and reverses it back to DNA
  33. aFter reverse transciptase has happend and the DNA is transferred into the host nucleus and intergrated into the host chromosome this is called?
  34. oncogenes transform normal cells in to what?
    cancer cells
  35. These cells have become cancerous or tumor cells have an increased growth and loss of contact inhibition also have tumor specific antigens located on them and t antigens
    transformed cells
  36. Papilloma virus, epstein barr and hepatitis B virus are what kind of viruses?
    ocogogenic DNA viruses
  37. human t cell luekemia and feline lukemia are exaples of what kind of viruses?
    ocogogenic RNA viruses
  38. Epstein BArr causes what?
  39. Viruses remains asystematic in host cell for long periods such as cold sores and shingles is known as
  40. Disease processes occurs over a long period of time and is generally fatal such as the measles virus is known as
  41. proteins that are infectious are known as
  42. Sheep scrapie, creutzfeldt-jacob disease, gerstmann-straulssler schinker syndrome, fatal familial insomnia and mad cow disease are caused by what kind of cell?
  43. When a prion bumps into a normal protein what happens to that normal prtein?
    it turns into another abnrmal protein because it is contagious
  44. An infectious RNA, no protein no capsid and resemble introns, what are they?
  45. Viroids are only found in where?
    plants so far