Viruses/Bacteria Quiz

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Anonymous
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74890
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Viruses/Bacteria Quiz
Updated:
2011-03-23 23:10:52
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virus bacteria gwinnett county
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Viruses and bacteria review for 9th grade biology in Gwinnett County
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  1. Are bacteria cells prokaryotes or eukaryotes?
    prokaryotes
  2. Are bacteria single-celled or multicellular?
    single-celled
  3. What are the three shapes of bacteria?
    • bacili(rod)
    • spirilla(spiral)
    • cocci(sphere)
  4. What is Anthrax?
    a rod-shaped bacteria transmitted through the air and it purplish when dyed
  5. What are three examples of bacteria?
    • salmonella
    • streptococcus pnuemoniac(strep throat and pnuemonia)
    • ghonnorhea
  6. Is bacterial meningitis or viral meningitis worse?
    Bacterial
  7. True or false-bacteria have cell walls
    true
  8. What is unique about a bacteria's chromosomes?
    there is one circular chromosome
  9. What is the outer capsule on a bacteria used for?
    protection
  10. What are flagella?
    whip-like protrusions that allow a bacteria to move
  11. What are archaebacteria?
    • ancient bacteria that live in extreme conditions
    • love high temperatures and acid
    • halophiles(salt)
    • methane gas(produce methanogens)
    • they usually do not need oxygen or are anaerobic
  12. What are eubacteria?
    • true bacteria that are found in diverse environments
    • most cell walls contain peptidoglycan(carbohydrates)
    • they form colonies or clumps or flaments
  13. Bacteria can be one or more of the following...
    • heterotrophs
    • autotrophs
    • -chemotrophs
    • -phototrophs
  14. Are viruses cells? Why not?
    Viruses are NOT cells because viruses do not grow and have no life span, viruses do not use energy, and viruses reproduce but only in other cells by using that cell's energy
  15. What are viruses made of?
    They are composed of a nucleic acid (DNA or RNA) and surrounded by a protein coat called a capsid. Some viruses also have additional viral envelopes.
  16. What is a capsid?
    A protein coat surrounding a virus
  17. What are the three possible shapes of a virus?
    • polyhedral
    • helical
    • spericle
  18. Viruses' _ allow them to attach only to specific cells. Thus, they can only infect certain organisms, some can affect several different speicies
    capsids
  19. What is a bacteriophage?
    A virus that infects a bacteria
  20. Label the parts of the bacteriophage.
  21. What are the steps to the lytic cycle?
    • 1. Attachment
    • 2. Penetration
    • 3. Biosynthesis(replication)
    • 4. Maturation
    • 5. Release(lysis)
  22. What is different of the lysogenic cycle compared to the lysic cycle?
    the lysogenic cycle is the same as the lytic cycle exceot the viral DNA joins the host cell DNA

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