Microbiology: Chapter 7

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Microbiology Quizzes & Trivia

  
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  • 1. 
    Like all organisms, bacteria have both ______ and _______ requirements if they are to grow 

  • 2. 
    Growth usually refers to the increase in which of these
    • A. 

      Increase in the number of cells present

    • B. 

      Increase in the size of cells


  • 3. 
    Which of these words describes when a cell is in an environment of its "best growth"
    • A. 

      Optimum

    • B. 

      Minimum

    • C. 

      Maximum


  • 4. 
    Which of these words describes when a cell is in its lowest possible temperate environment in which it can still grow?
    • A. 

      Optimum

    • B. 

      Minimum

    • C. 

      Maximum


  • 5. 
    Which of these words describes when a cell is in its highest temperate environment in which it can still grow?
    • A. 

      Optimum

    • B. 

      Minimum

    • C. 

      Maximum


  • 6. 
    Can grow at 0 degrees C, optimum at <15 degrees. Are considered obligate with respect to cold. Live normally in arctic conditions. 
    • A. 

      Psychrotrophs

    • B. 

      Mesophiles

    • C. 

      Extreme (hyper) thermophiles

    • D. 

      Thermophiles

    • E. 

      Psychrophiles


  • 7. 
    Can grow at 0 degress C, optimum is about 20-30 degrees. Most important with food spoilage. 
    • A. 

      Psychrotrophs

    • B. 

      Mesophiles

    • C. 

      Extreme (hyper) thermophiles

    • D. 

      Thermophiles

    • E. 

      Psychrophiles


  • 8. 
    Optimal temperatures are 50-60 degrees C, and range from 40-70. 
    • A. 

      Psychrotrophs

    • B. 

      Mesophiles

    • C. 

      Extreme (hyper) thermophiles

    • D. 

      Thermophiles

    • E. 

      Psychrophiles


  • 9. 
    Optimal temperatures of 35-40 degrees C, range 10-50. They are the most common, most pathogens are this type. 
    • A. 

      Psychrotrophs

    • B. 

      Mesophiles

    • C. 

      Extreme (hyper) thermophiles

    • D. 

      Thermophiles

    • E. 

      Psychrophiles


  • 10. 
    Optimum temperatures are 80 degrees C or greater (usually archea). Found in volcanoes 
    • A. 

      Psychrotrophs

    • B. 

      Mesophiles

    • C. 

      Extreme (hyper) thermophiles

    • D. 

      Thermophiles

    • E. 

      Psychrophiles


  • 11. 
    Which are the only two types of bacteria that humans come into contact with normally?
    • A. 

      Thermophiles and Psychrophiles

    • B. 

      Extreme thermophiles and Psychrotrophs

    • C. 

      Mesophiles and Psychrotrophs

    • D. 

      Thermophiles and Extreme thermophiles


  • 12. 
    Most bacteria thrive in a neutral pH, some are called acidophiles whose optimal pH can be as low as what?
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      1


  • 13. 
    Halophiles are a type of bacteria that can exist in this type of condition. 
    • A. 

      Hypertonic

    • B. 

      Hypotonic

    • C. 

      Isotonic


  • 14. 
    The chemical need for ammonia, nitrate, or nitrite is found within 
    • A. 

      Hetertrophs

    • B. 

      Autotrophs

    • C. 

      Nitrogen fixers


  • 15. 
    The chemical need for atmospheric nitrogen (N2) is normally found within
    • A. 

      Hetertrophs

    • B. 

      Autotrophs

    • C. 

      Nitrogen Fixers


  • 16. 
    This chemical requirement, phosphorous, is taken in with inorganic phosphate (PO4^(-3)) 
    • A. 

      Hetertrophs

    • B. 

      Autotrophs

    • C. 

      Nitrogen Fixers


  • 17. 
    The need for oxygen to live is an....
    • A. 

      Obligate aerobe

    • B. 

      Facultative anaerobe

    • C. 

      Obligate anaerobe

    • D. 

      Aerotolerant anaerobes

    • E. 

      Microaerophiles


  • 18. 
    May use oxygen if present, but can exist without it (fermentation). This is an
    • A. 

      Obligate aerobe

    • B. 

      Facultative anaerobe

    • C. 

      Obligate anaerobe

    • D. 

      Aerotolerant anaerobes

    • E. 

      Microaerophiles


  • 19. 
    Cannot tolerate oxygen. This is an example of 
    • A. 

      Obligate aerobe

    • B. 

      Facultative anaerobe

    • C. 

      Obligate anaerobe

    • D. 

      Aerotolerant anaerobes

    • E. 

      Microaerophiles


  • 20. 
    Will not use oxygen, but it wont kill them. This is an...
    • A. 

      Obligate aerobe

    • B. 

      Facultative anaerobe

    • C. 

      Obligate anaerobe

    • D. 

      Aerotolerant anaerobes

    • E. 

      Microaerophiles


  • 21. 
    Need oxygen, but only will grow under low oxygen concentrations (soil, water) 
    • A. 

      Obligate aerobe

    • B. 

      Facultative anaerobe

    • C. 

      Obligate anaerobe

    • D. 

      Aerotolerant anaerobes

    • E. 

      Microaerophiles


  • 22. 
    Superoxide dismutase is an enzyme that helps the conversion of which of these?
    • A. 

      O2- > H2O2

    • B. 

      H2O2 > H2O and O2

    • C. 

      H2O2 > H2O


  • 23. 
    Catalase is an enzyme that aids in the conversion of which of these?
    • A. 

      O2- > H2O2

    • B. 

      H2O2 > H2O and O2

    • C. 

      H2O2 > H2O


  • 24. 
    Peroxidase is an enzyme that aids in the conversion of which of these? 
    • A. 

      H2O2 > H2O and O2

    • B. 

      O2- > H2O2

    • C. 

      H2O2 > H2O


  • 25. 
    CULTURE MEDIA: Liquid
    • A. 

      Culture is suspended in a liquid

    • B. 

      Agar is poured into plates and solidifies, bacteria grow in colonies on the surface


  • 26. 
    CULTURE MEDIA: Solid 
    • A. 

      Culture is suspended in a liquid

    • B. 

      Agar is poured into plates and solidifies, bacteria grow in colonies on the surface


  • 27. 
    Can cold kill bacteria?
    • A. 

      Yes

    • B. 

      No


  • 28. 
    Bacteria divide by which of the following?
    • A. 

      Sexual reproduction

    • B. 

      Budding

    • C. 

      Binary Fission


  • 29. 
    Generation time is the time it takes for one cell to become 
    • A. 

      Two

    • B. 

      Three

    • C. 

      Four


  • 30. 
    Bacterial cells grow how?
    • A. 

      Exponentially

    • B. 

      Multiplication

    • C. 

      Logarhithmically


  • 31. 
    This phase of growth has little growth, and high metabolic activity. 
    • A. 

      The lag phase

    • B. 

      The log phase

    • C. 

      The stationary phase

    • D. 

      The death phase


  • 32. 
    This phase has exponential growth. 
    • A. 

      The lag phase

    • B. 

      The log phase

    • C. 

      The stationary phase

    • D. 

      The death phase


  • 33. 
    In this phase the number of cells remains the same, because the rate of death equals the rate of growth. 
    • A. 

      The lag phase

    • B. 

      The log phase

    • C. 

      The stationary phase

    • D. 

      The death phase


  • 34. 
    This phase has an exponential decline.
    • A. 

      The lag phase

    • B. 

      The log phase

    • C. 

      The stationary phase

    • D. 

      The death phase


  • 35. 
    In order to determine the number of bacterial cells present we must serially dilute the sample, and plate the dilution until a countable plate is reached. Then, count the colonies and multiply by the dilution factor. 
    • A. 

      True

    • B. 

      False


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