Chapter 8 Microbiology Quiz

56 Questions | Total Attempts: 274

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Microbiology Quizzes & Trivia

Microbiology gives the learner a chance to study the biology of bacteria, viruses, protozoa and fungi. If one has a good understanding on this topic they will be able to have answers to some scientific questions on diseases. Do you believe you got a proper understanding of Chapter 8 on Microbiology? Take up the quiz below.


Questions and Answers
  • 1. 
    Which of the following inhibits bacterial growth but does not kill bacteria  
    • A. 

      Lysozyme

    • B. 

      Bactericidal agent

    • C. 

      Bacteriostatic agent

    • D. 

      Antiseptic agent

  • 2. 
    When antiseptics and disinfectants are compared, antiseptics are generally  
    • A. 

      Less toxic

    • B. 

      More toxic

    • C. 

      Equally as toxic

    • D. 

      Unpredictable in toxicity

  • 3. 
    An agent that specifically kills fungi but not other kinds of microorganisms is also known as a  
    • A. 

      Fungistatic agent

    • B. 

      Mycostatic agent

    • C. 

      Fungicidal agent

    • D. 

      Germicidal agent

  • 4. 
    Sterilization involves __________ all viable microorganisms.  
    • A. 

      Killing

    • B. 

      Removing

    • C. 

      Killing OR removing

    • D. 

      Metabolically inactivating

  • 5. 
    All germicides are capable of killing all pathogenic organisms and endospores.  
    • A. 

      True

    • B. 

      False

  • 6. 
    An agent that kills bacteria is referred to as __________.  
  • 7. 
    An agent that prevents the growth of bacteria without causing irreversible damage to the bacteria is referred to as __________.  
  • 8. 
    The destruction or removal of all viable organisms is called  
    • A. 

      Disinfection

    • B. 

      Antisepsis

    • C. 

      Sterilization

    • D. 

      Sanitization

  • 9. 
    The reduction of the microbial population to levels that are considered safe by public health standards is called  
    • A. 

      Disinfection

    • B. 

      Antisepsis

    • C. 

      Sterilization

    • D. 

      Sanitization

  • 10. 
    The prevention of infection caused by microorganisms is called  
    • A. 

      Disinfection

    • B. 

      Antisepsis

    • C. 

      Sterilization

    • D. 

      Sanitization

  • 11. 
    The substantial reduction of the total population of microorganisms on inanimate objects and the destruction of potential pathogens is called  
    • A. 

      Disinfection

    • B. 

      Antisepsis

    • C. 

      Sterilization

    • D. 

      Sanitization

  • 12. 
    A(n) __________ is a chemical that can be used to sterilize materials.  
    • A. 

      Oxidant

    • B. 

      Disinfectant

    • C. 

      Antiseptic

    • D. 

      Sterilant

  • 13. 
    Which of the following represents the best definition for microbial death?  
    • A. 

      The organism will not grow on minimal medium.

    • B. 

      The organism will not grow on a medium that normally supports its growth.

    • C. 

      The organism no longer retains its original shape and structures.

    • D. 

      None of these adequately describe microbial death.

  • 14. 
    The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the  
    • A. 

      Thermal death time (TDT).

    • B. 

      Thermal death point (TDP).

    • C. 

      Decimal reduction time (D value).

    • D. 

      Z value

  • 15. 
    The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.  
    • A. 

      True

    • B. 

      False

  • 16. 
    Which of the following influence(s) the efficiency of an antimicrobial agent?  
    • A. 

      Concentration of the agent

    • B. 

      Duration of exposure

    • C. 

      Temperature

    • D. 

      All of the above

  • 17. 
    Larger populations generally are killed as rapidly as smaller populations.  
    • A. 

      True

    • B. 

      False

  • 18. 
    Which will require a longer time to kill?  
    • A. 

      A larger population of microorganisms

    • B. 

      A smaller population of microorganisms

    • C. 

      Killing will be equally as rapid in a large or a small microbial population.

    • D. 

      There is no way to predict which will require a longer kill time.

  • 19. 
    Microorganisms show differential sensitivity to antimicrobial agents.  
    • A. 

      True

    • B. 

      False

  • 20. 
    Which of the following environmental factors generally do(es) not have an impact on the efficiency of an antimicrobial agent?  
    • A. 

      PH

    • B. 

      Presence or absence of a biofilm

    • C. 

      Concentration of organic matter

    • D. 

      Refractive index

  • 21. 
    Which of the following is not a method of heat sterilization?    
    • A. 

      Autoclaving

    • B. 

      Boiling

    • C. 

      Pasteurization

    • D. 

      All of these are equally effective against resistant endospores.

  • 22. 
    Which of the following is MOST effective against resistant endospores?  
    • A. 

      Autoclaving

    • B. 

      Boiling

    • C. 

      Pasteurization

    • D. 

      All of these are equally effective against resistant endospores

  • 23. 
    Which of the following lacks sufficient penetrating power for bulk sterilization?  
    • A. 

      Ultraviolet (UV) radiation at 260 nm

    • B. 

      X rays

    • C. 

      Gamma radiation

    • D. 

      Alpha and beta particles

  • 24. 
    Moist heat sterilization at 100C kills all of the following except  
    • A. 

      Bacterial endospores.

    • B. 

      Fungal spores

    • C. 

      Viruses

    • D. 

      Bacterial endospores and fungal spores

  • 25. 
    Gamma radiation  
    • A. 

      Is a type of nonionizing radiation.

    • B. 

      Has poor penetrating power.

    • C. 

      Is used to sterilize some food products.

    • D. 

      Has a longer wavelength than UV radiation.

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