Test Your Microbiology Skills - Quiz

16 Questions | Total Attempts: 1035

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Test Your Microbiology Skills - Quiz

Microbiology is the study of very tiny organisms, formally knows as microorganisms, especially those which cause infections and diseases. It is one of the most important branches of microbiology. Take this test and learn more about the study of microorganisms.


Questions and Answers
  • 1. 
    Which of the following terms describes organisms that thrive in the cold?
    • A. 

      Mesophiles

    • B. 

      Thermophiles

    • C. 

      Psychrophiles

    • D. 

      Aerophiles

  • 2. 
    An organism is completely dependant on atmospheric O2 for growth. This organism is a(n)
    • A. 

      Osmotolerant

    • B. 

      Facultative anaerob

    • C. 

      Obligate aerob

    • D. 

      Acidophile

  • 3. 
    The term facultative anaerobe refers to an organism that _________
    • A. 

      Uses oxygen when present or grows without oxygen when oxygen is absent

    • B. 

      Doesn't use oxygen but tolerates it

    • C. 

      Prefers to grow without oxygen

    • D. 

      Is killed by oxygen.

  • 4. 
    A microbiology student noticed that a culture broth tube was very turbid at the surface but clear throughout the rest of the tube. She can conclude that the ____________
    • A. 

      Organism should be grown in an anaerobic chamber.

    • B. 

      Organism cannot produce superoxide dismutase and/or catalase.

    • C. 

      Organism are aerobes.

    • D. 

      Broth is sterile.

  • 5. 
    Which of the following procedures can be used to isolate a pure culture of a bacterium from a mixture?
    • A. 

      Streak plating

    • B. 

      Dilution plating

    • C. 

      Enrichment culture

    • D. 

      All the above can be used to isolate a pure culture of a bacterium from a mixture.

  • 6. 
    Addition of blood to a culture medium only allows the hemolytic bacteria that grow on the plate to be picked out. This is an example of a
    • A. 

      Liquid media.

    • B. 

      Chemically defined media.

    • C. 

      Selective media.

    • D. 

      Differential media.

  • 7. 
    Addition of salt to a culture medium only allows the salt-tolerant bacteria to grow. This is an example of a
    • A. 

      Complex media.

    • B. 

      Selective media.

    • C. 

      Enriched media.

    • D. 

      Differential media.

  • 8. 
    Plates should be incubated
    • A. 

      Agar side up

    • B. 

      Agar side down

    • C. 

      It doesn't matter

  • 9. 
    When streaking a plate, the lid should be
    • A. 

      placed on the bench top, top side up

    • B. 

      Placed on the bench top, inside surface up

    • C. 

      Should be held in the same hand as the plate

    • D. 

      Should be held in the opposite hand from the plate

  • 10. 
    When streaking a plate, the loop should be flamed
    • A. 

      At the beginning and end

    • B. 

      At the beginning and end and between the first 2 zones

    • C. 

      At the beginning and end and between each zone

    • D. 

      At the beginning and end and between the second and third zone

  • 11. 
    Which of these factors will not affect your Gram stain results? (Given that everything else is done correctly.)
    • A. 

      Bacterial Age

    • B. 

      Reagent Quality

    • C. 

      Excessive Washing of Slide

    • D. 

      Sample Thickness

  • 12. 
    During log phase, bacteria are
    • A. 

      Preparing to divide.

    • B. 

      Dying and dividing in equal numbers.

    • C. 

      Dying exponentially.

    • D. 

      Dividing at the fastest possible rate.

  • 13. 
    What stain technique has been use for this staining?
    • A. 

      Gram staining

    • B. 

      Endospore Staining

    • C. 

      Acid fast staining

    • D. 

      Simple staining

  • 14. 
    Specific organisms that are considered strict anaerobic anaerobs include:
    • A. 

      E.coli and Streptococus pneumoniae

    • B. 

      Bacteroides and klebsieella

    • C. 

      Fusobacterium and clostridium

    • D. 

      Peptostreptococus and nocardia

  • 15. 
    Proved the microorganisms cause disease
    • A. 

      Koch

    • B. 

      Pasteur

    • C. 

      Lister

    • D. 

      Jenner

  • 16. 
    What type of media would the plate in the figure be if it allowed most all bacteria to grow, but distinguished between colonies of one organism from another?
    • A. 

      Enrichment

    • B. 

      Differential

    • C. 

      Selective

    • D. 

      Reducing

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