Microbiology I - Multiple Choice Questions

20 Questions  I  By Bosscz
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Microbiology Quizzes & Trivia
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  • 1. 
    Which of the following media is used for culturing Salmonella?
    • A. 

      VL-broth

    • B. 

      Sabouraud agar

    • C. 

      Slanetz Bartley

    • D. 

      Selenite Broth


  • 2. 
    Arabinose is a test-tube test used for:
    • A. 

      Enterococci

    • B. 

      Salmonella

    • C. 

      G- bacteria

    • D. 

      Neisseriae


  • 3. 
    Choose the incorrect statement about Endo agar:
    • A. 

      Only some G+ bacteria can grow on it selectively

    • B. 

      Can be used to differentiate lactose fermentation

    • C. 

      Is similar to McConkey medium

    • D. 

      Combines selective and diagnostic properties


  • 4. 
    Choose the correct statement about Antigen detection:
    • A. 

      It is an indirect method

    • B. 

      Negative result means presence of microbe in the patient’s body

    • C. 

      It is carried out in the laboratory using antibodies of animal origin

    • D. 

      Uses a sample of patients saliva


  • 5. 
    The third phase of the PCR reaction involves:
    • A. 

      Detection of amplification product

    • B. 

      Amplification of DNA

    • C. 

      Breakdown of DNA

    • D. 

      Obtaining isolated DNA


  • 6. 
    Chocolat agar is an example of a pure enriched medium used for culturing:
    • A. 

      Streptococci

    • B. 

      Hemophili

    • C. 

      Enterococci

    • D. 

      Fungi


  • 7. 
    When using Hanja medium, if the colour of the whole medium is yellow it means:
    • A. 

      Formation of H2S

    • B. 

      Bacterium is not a glucose fermenter

    • C. 

      Bacterium is a lactose fermenter

    • D. 

      Bacterium is not a lactose fermenter


  • 8. 
    Optochin is used to test:
    • A. 

      Lactose fermentation

    • B. 

      Motility

    • C. 

      Glucose fermentation

    • D. 

      Antibiotic susceptibility


  • 9. 
    Löwentein-Jensen medium is used for culturing:
    • A. 

      Enterobacteria

    • B. 

      Tuberculosis

    • C. 

      Salmonella

    • D. 

      G+ bacteria


  • 10. 
    Arabinose is a test-tube test used for:
    • A. 

      Salmonella

    • B. 

      Neisseriae

    • C. 

      Enterococci

    • D. 

      G- bacteria


  • 11. 
    Choose the incorrect statement about E-tests
    • A. 

      The testing strip has a rising Atb concentration

    • B. 

      The test is qualitative

    • C. 

      The strip has a scale

    • D. 

      Principally similar to diffusion disc test


  • 12. 
    The MIC Value is:
    • A. 

      The highest concentration that inhibits growth

    • B. 

      The highest concentration that allows growth

    • C. 

      The lowest concentration that inhibits growth

    • D. 

      The lowest concentration that inhibits growth


  • 13. 
    In microdilution testing, if MIC Value > breakpoint;
    • A. 

      Strain is suceptible

    • B. 

      Strain is resistant

    • C. 

      A different test is needed

    • D. 

      None of the answers are correct


  • 14. 
    Haemagluttination Inhibition Test:
    • A. 

      Is not an agglutination reaction

    • B. 

      Is a neutralisation reaction

    • C. 

      Result with a dense round target is positive

    • D. 

      All answers are correct


  • 15. 
    Choose the correct statement about ASO:
    • A. 

      Is a direct diagnostics reaction

    • B. 

      The aim is to find a pathogen

    • C. 

      ASO examination is indicated in rheumatoid fever

    • D. 

      All of the answers are correct


  • 16. 
    Which of the following is NOT considered a classification of PCR:
    • A. 

      Specific PCR

    • B. 

      Multiplex PCR

    • C. 

      Universal PCR

    • D. 

      Segmental PCR


  • 17. 
    In the first phase of PCR reaction:
    • A. 

      We have to find isolated DNA

    • B. 

      Product is initially detected

    • C. 

      We have to amplify the DNA

    • D. 

      None of the answers are correct


  • 18. 
    Catalase test is used for:
    • A. 

      Diagnostics of G+ cocci

    • B. 

      Diagnostics of G+ rods

    • C. 

      Uses hydrogen peroxide

    • D. 

      All answers are correct


  • 19. 
    Indol test positivity is indicated by presence of:
    • A. 

      A red ring

    • B. 

      Colour change to yellow

    • C. 

      Colour change to blue

    • D. 

      Increased turbidity


  • 20. 
    Octal codes are used in:
    • A. 

      MIU test

    • B. 

      Optochin test

    • C. 

      Plate tests

    • D. 

      Catalase test


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