Exam 1 Microbio

47 Questions | Total Attempts: 40

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Exam 1 Microbio

Palomar College LBW


Questions and Answers
  • 1. 
    Which of these is FALSE about prokaryotic cells?
    • A. 

      Has a true nucleus

    • B. 

      No membrane bound organelles

    • C. 

      Small

    • D. 

      Cannot specialize

  • 2. 
    Staphlospirillum would look like
    • A. 

      Cluster of squiggly commas

    • B. 

      Row of rod shapes

    • C. 

      Two comma shapes

    • D. 

      Cluster of rod shapes

  • 3. 
    What is NOT an example of a eukaryotic cells
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Protozoa

    • D. 

      Algae

  • 4. 
    Which of these does NOT make up the lattice protecting the entire bacterial cell wall
    • A. 

      NAG/ NAM backbone

    • B. 

      Amino acids

    • C. 

      Cross links

    • D. 

      Glycocalyx

  • 5. 
    Which is not a component of a Gram - prokaryotic cell wall
    • A. 

      Thick peptidoglycan cell wall

    • B. 

      Porins

    • C. 

      LPS

    • D. 

      Thin peptidoglycan cell wall

  • 6. 
    Which of these does the application of alcohol remove dye from the stains?
    • A. 

      Gram -

    • B. 

      Gram +

  • 7. 
    What is NOT a purpose of the glycocalyx?
    • A. 

      Avoid phagocytosis from hosts cells

    • B. 

      Helps with cell identification in eukaryotes

    • C. 

      Allows the cell to attach to various surfaces

    • D. 

      Temporary bridging between two bacteria to share and transfer DNA

  • 8. 
    What is NOT a phase of endosporulation?
    • A. 

      Cell dies if sporlation does not acquire host

    • B. 

      A copy of DNA is made

    • C. 

      Packs ribosomes, nutrients, enzymes and DNA

    • D. 

      Cell gets stressed

  • 9. 
    What does the S layer do?
    • A. 

      Acts as a buffer if the environment is too acidic or basic

    • B. 

      Allows for identification from other cells

    • C. 

      Allows for semi permiability

    • D. 

      Makes sure the cell does not burst in hypotonic enviroments

  • 10. 
    What is NOT a function of proteins
    • A. 

      Storage of energy

    • B. 

      Assist in chemical reactions

    • C. 

      Structure

    • D. 

      Transportation of molecules

  • 11. 
    Which cell wall is more susceptible to mechanical breakage?
    • A. 

      Gram -

    • B. 

      Gram +

    • C. 

      Both

    • D. 

      Peptidoglycan

  • 12. 
    Which of these is NOT a category of chemical reactions
    • A. 

      Disassociation of H

    • B. 

      Covalent bonds

    • C. 

      Hydrophobic interactions

    • D. 

      Ionic bonds

  • 13. 
    What makes the alpha helixes (curly qs)
    • A. 

      Hydrogen bonds

    • B. 

      Covalent bonds

    • C. 

      Ionic bonds

    • D. 

      Hydrophobic bonds

  • 14. 
    Which of these would NOT denature a protein?
    • A. 

      Freezing

    • B. 

      Heat

    • C. 

      Strong acid

    • D. 

      Strong base

  • 15. 
    Who disproved spontaneous generation/germ theory for good with his flask experiment 
    • A. 

      Louis Pasture

    • B. 

      Francis Reddy

    • C. 

      Anton van leeuwenhoek

    • D. 

      Rober Koch

  • 16. 
    Who used the jar of meat experiment to disprove spontaneous generation?
    • A. 

      Fransisco Redi

    • B. 

      Louis Pasture

    • C. 

      Robert Koch

    • D. 

      Anton van leeuwenhoek

  • 17. 
    Who discovered penicillin?
    • A. 

      Alexander Fleming

    • B. 

      Robert Koch

    • C. 

      Fransisco Redi

    • D. 

      Anton van leeuwenhoek

  • 18. 
    What would be the genius and what would be the species of E. Coli?
    • A. 

      Genius: eshericia species: coli

    • B. 

      Genius: coli species: eshericia

    • C. 

      Genius: Coli species: E.

  • 19. 
    Which is NOT one way we test or identify for unknown bacteria
    • A. 

      Microscopy

    • B. 

      Stains

    • C. 

      Nutrient assay

    • D. 

      Different media plates

    • E. 

      DNA signatures

    • F. 

      Antigen tests

    • G. 

      Growth patterns in different enviroments

  • 20. 
    What is a conjugation pilus
    • A. 

      Temporary bridge between two bacteria to share DNA

    • B. 

      Hair like protrusions that allow bacterial attachment

    • C. 

      Helps bacteria evade the immune system of host

    • D. 

      Allows the cell to attach to cell wall

  • 21. 
    What is chemotaxis
    • A. 

      Microbe moves away or towards a desirable or toxic chemical

    • B. 

      Movement in the presence of light

    • C. 

      When a microbe injects chemicals to survive off the host

  • 22. 
    Where is the site of protein synthesis involved in the cell
    • A. 

      Ribosomes

    • B. 

      Nuclear envelope

    • C. 

      Nucleus

    • D. 

      Endoplasmic Reticulum

  • 23. 
    Which has a peptidoglycan
    • A. 

      Prokaryotes

    • B. 

      Eukaryotes

  • 24. 
    Which of these does RED dye stain
    • A. 

      Gram -

    • B. 

      Gram +

  • 25. 
    The outer plasma membrane contains .... which make it semi permeable and the cell membrane is selectively permeable because it contains.....
    • A. 

      Porins, membrane proteins

    • B. 

      Membrane proteins, porins

    • C. 

      Enzymes, polysaccharides

    • D. 

      Cell wall, plasma membrane