Microbiology: Chapter 8

27 Questions | Total Attempts: 331

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Microbiology Quizzes & Trivia

Questions and Answers
  • 1. 
    Which of these are reasons to control microbial growth? (Choose all that apply)
    • A. 

      Prevention and treatment of infection

    • B. 

      Prevention of infection

    • C. 

      Is a form of secondary prevention

    • D. 

      Prevention of food spoilage

  • 2. 
    Match the term to the definition: Sterilization 
    • A. 

      The complete destruction of all microbes on an object

    • B. 

      The reduction or inhibition of microbial growth on non-living surface

    • C. 

      The reduction or inhibition of microbial growth on living tissue

  • 3. 
    Match the term to the definition: Disinfection 
    • A. 

      The complete destruction of all microbes on an object

    • B. 

      The reduction or inhibition of microbial growth on non-living surface

    • C. 

      The reduction or inhibition of microbial growth on living tissue

  • 4. 
    Match the term to the definition: Antisepsis 
    • A. 

      The complete destruction of all microbes on an object

    • B. 

      The reduction or inhibition of microbial growth on non-living surface

    • C. 

      The reduction or inhibition of microbial growth on living tissue

  • 5. 
    Bacteria tend to die at a fixed exponential rate, meaning X^2(squared) 
    • A. 

      True

    • B. 

      False

  • 6. 
    Choose all those that are correct when asking how various agents harm bacteria. 
    • A. 

      Damage to cell wall

    • B. 

      Alteration of membrane permeability

    • C. 

      Damage to proteins and/or nucleic acids

    • D. 

      Controlled by either physical or chemical agents

    • E. 

      All of these

    • F. 

      Only A, B, and C

  • 7. 
    Heat can quickly  denatures proteins, may damage the membrane by making it more fluid and denature DNA and RNA 
    • A. 

      True

    • B. 

      False

  • 8. 
    Boiling water kills most bacteria and viruses but how long does it take to kill each of these?
    • A. 

      10 minutes for bacteria, 15 minutes for a virus

    • B. 

      15 minutes for a bacteria, 25 minutes for a virus

    • C. 

      10 minutes for a bacteria, 20 minutes for a virus

    • D. 

      5 minutes for bacteria, 20 minutes for a virus

  • 9. 
    Which of these is most popular in sterilizing culture media and lab instruments?
    • A. 

      Autoclaving

    • B. 

      Dry heat

    • C. 

      Purell

    • D. 

      Antiseptics

  • 10. 
    Pasteurization is the....
    • A. 

      Short duration/high temperature treatment of food (72C for 15 seconds)

    • B. 

      Long duration/low temperature treatment of food (12C for 3 hours)

    • C. 

      Short duration/low temperature treatment of food (12C for 15 seconds)

    • D. 

      Long duration/high temperature treatment of food (72C for 3 hours)

  • 11. 
    Dry heat kills by oxidizing and can...
    • A. 

      Denature protein and DNA

    • B. 

      Slow the growth of bacteria

    • C. 

      Inhibits growth of new bacteria

  • 12. 
    What are two methods of dry heat?
    • A. 

      Incineration (combustion)

    • B. 

      Dry ovens

    • C. 

      Heat lamp

    • D. 

      Natual heat source (sun)

  • 13. 
    A good example of dry is flaming a loop used to transfer bacteria to a petri plate 
    • A. 

      True

    • B. 

      False

  • 14. 
    COLD does not kill the microorganism but it will _______ bacterial growth.
  • 15. 
    Dessication is the......
    • A. 

      Removal of water

    • B. 

      Addition of water

  • 16. 
    Dessication may help to stop growth, but doesn't necessarily kill bacteria. 
    • A. 

      True

    • B. 

      False

  • 17. 
    Many endospores are resistant to dessication 
    • A. 

      True

    • B. 

      False

  • 18. 
    Freeze drying also called lyophilizaiton is the...
    • A. 

      Simultaneous combination of freezing and heating

    • B. 

      Simultaneous combination of freezing and addition of water

    • C. 

      Simultaneous combination of freezing and dessication

  • 19. 
    Filtration is the passage of a liquid through a filter that create a filtrate (microbes), there are membrane filters that can eliminate most bacteria, however,which of these statements is something that is not true of filtration.
    • A. 

      Filters cannot help you obtain toxins that may be present

    • B. 

      Filters can remove toxins that could be present

    • C. 

      Filtration can help to separate microorganisms from a liquid

  • 20. 
    Osmotic pressure treatment is the use of ____ and causes _____.
    • A. 

      Salts, freeze drying

    • B. 

      Ice, plasmolysis

    • C. 

      Salts, plasmolysis

  • 21. 
    Radiation helps to kill bacteria which of these types of radiation are considered "ionizing" (Choose all that apply)
    • A. 

      Gamma rays

    • B. 

      UV

    • C. 

      Microwaves

    • D. 

      X-Rays

  • 22. 
    Radiation kills bacteria in many ways, one of these is Non-ionizing which can be which of these? (Choose all that apply)
    • A. 

      Gamma rays

    • B. 

      UV

    • C. 

      Microwaves

    • D. 

      X-Rays

  • 23. 
    Halogens are which of these (as it applies to us for this class)
    • A. 

      Earth metals

    • B. 

      Strong oxidizing agents

    • C. 

      Non-earth metals

    • D. 

      Weak oxidizing agents

  • 24. 
    Match the term to the statement: When chlorine is added to water, what forms is a strong oxidizing agent and disrupts enzymes. 
    • A. 

      Hypochlorite

    • B. 

      Hypochlorous acid

    • C. 

      Compressed chlorine gas

    • D. 

      Bleach

  • 25. 
    Match the term to this statement: The chemical choice in treatment of swimming pools.
    • A. 

      Hypochlorite

    • B. 

      Hypochlorous acid

    • C. 

      Compressed chlorine gas

    • D. 

      Bleach