Practice Quiz On Microbiology Exam

48 Questions | Total Attempts: 3288

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Practice Quiz On Microbiology Exam

The final exams are upon us, and there is no doubt that you have been putting up a lot of effort to ensure that you do not fail. The quiz below is specifically designed to provide that you can refresh your mind on all that you have covered so far while at the same time giving you an idea on how the questions might be set. Give it a try!


Questions and Answers
  • 1. 
    Semmelweis showed that the transmission of disease could be interrupted by
    • A. 

      Pasteurizing milk

    • B. 

      Washing hands with chlorine water

    • C. 

      Disinfecting water supplies

    • D. 

      Killing disease-carrying mosquitos

  • 2. 
    All of the following characteristics apply to the prokaryotes except
    • A. 

      They reproduce only by mitosis

    • B. 

      They include the bacteria

    • C. 

      They lack a nucleus

    • D. 

      They are composed of single cells

  • 3. 
    Microbiology failed to rapidly develop after Leeuwenhoek's time because
    • A. 

      Pure culture techniques were lacking

    • B. 

      The relationship of microorganisms of disease was not established

    • C. 

      Vaccines were in common use

    • D. 

      The Netherlands was in the midst of a war in England

  • 4. 
    Pasteurs study of fermantation was critical to the development of microbiology because
    • A. 

      Fermentation chemistry occurs in the living body

    • B. 

      It showed that microorganisms bring about chemical changes

    • C. 

      It demonstrated that yeasts are involved in diseases

    • D. 

      The body undergoes rapid fermentation after death

  • 5. 
    Koch's postulates provided guidelines for
    • A. 

      Relating certain microorganisms with certain diseases

    • B. 

      Sterilizing laboratory supples

    • C. 

      Perparing pure cultures

    • D. 

      Testing the sensitivity of microbes to antibiotics

  • 6. 
    The classical Golden Age of microbiology came to an end partly due to the
    • A. 

      All infectious disease were known

    • B. 

      Death of Anton van Leeuwenhoek

    • C. 

      The advent of World War 1

    • D. 

      End of the Renaissance

  • 7. 
    Which one of the following groups is not resolved with the light microscope
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Viruses

    • D. 

      Molds

  • 8. 
    All of the following characteristics of prokaryotes except
    • A. 

      Prokaryotes have organelles

    • B. 

      Prokaryotes have ribosomes

    • C. 

      Prokaryotes lack a nucleus

    • D. 

      Prokaryotes have genes

  • 9. 
    Prokaryotes and eukaryotes differ primarily with regard to the absence or presence of a cell
    • A. 

      Membrane

    • B. 

      Wall

    • C. 

      Spore

    • D. 

      Nucleus

  • 10. 
    Which one of the following sequences exhibits increasing size
    • A. 

      Viruses to protozoa to bacteria

    • B. 

      Bacteria to viruses to fungi

    • C. 

      Fungi to protozoa to bacteria

    • D. 

      Viruses to bacteria to protozoa

  • 11. 
    The gram stain technique is valuable in distinguishing
    • A. 

      Type of fungi

    • B. 

      The size and structure of viruses

    • C. 

      The nucleus of bacteria from other cellular organelles

    • D. 

      Types of bacteria

  • 12. 
    Unicellular photosynthetic microbes that are eukaryotic are members of the
    • A. 

      Protista

    • B. 

      Monera

    • C. 

      Plantae

    • D. 

      Fungi

  • 13. 
    In the log phased of growth
    • A. 

      The death rate is equivalent to the reproductive rate

    • B. 

      The number of cells in the population increases rapidly

    • C. 

      The growth curve is at a plateau

    • D. 

      Spore formation is a common event

  • 14. 
    All the following are functions of the bacterial cell membrane except
    • A. 

      Lends ridigity to the cell

    • B. 

      Site of enzymes for energy production in the cell

    • C. 

      Enclosure for the cytoplasm

    • D. 

      Control of passage of biological molecules into the cytoplasm

  • 15. 
    Psychrophiles and thermophiles differ with respect to their
    • A. 

      Oxygen requirements

    • B. 

      Ability to tolerate salt

    • C. 

      PH requirements

    • D. 

      Best temperature for growth

  • 16. 
    An organism having pili has the advantage over one that alcks pili because
    • A. 

      It can move actively

    • B. 

      It can attach to specific surfaces

    • C. 

      It can obtain nutrients from beef broth

    • D. 

      It can be stained easily

  • 17. 
    Facultative bacteria are those that
    • A. 

      Grow on natural and synthetic media

    • B. 

      Produce spores or capsules, but not both

    • C. 

      Grow in the presence or absence of oxygen

    • D. 

      Possess cell membranes but no cell walls

  • 18. 
    ATP releases its energy by
    • A. 

      Activating its protons to form ions

    • B. 

      Absorbing heat from the enviornment

    • C. 

      Combing with other ATP molecules

    • D. 

      Splitting into a phosphate and ADP

  • 19. 
    In order for oxidative phosphorylation to take place, the environment must contain a certain amound of
    • A. 

      Oxygen

    • B. 

      Sunlight

    • C. 

      Energy supplied by atp

    • D. 

      Isotopes

  • 20. 
    The krebs cycle accounts for all the following except
    • A. 

      Production of CO2 molecules

    • B. 

      Production of NADH and FADH2

    • C. 

      Production of pyruvate from glucose

    • D. 

      Production of electrons for oxidative phosphorylation

  • 21. 
    The peptidoglycan of a bacterium
    • A. 

      Is embedded within the capsule

    • B. 

      Cannot be assembled if penicillin is present

    • C. 

      Is part of the cell membrane

    • D. 

      Is found in gram-positive bacteria only

  • 22. 
    Monotrichous and pritrichous bacteria differ in
    • A. 

      Their nutritional requirements

    • B. 

      Layers of the cell wall

    • C. 

      Spores formed per cell

    • D. 

      Number and position of the flagella

  • 23. 
    Enzymes play an important role in biological chemistry because they
    • A. 

      Break down to release metal ions

    • B. 

      Lower the amount of activation energy required for a reaction

    • C. 

      Raise the ionic strength of a water solution

    • D. 

      Retain the pH at the neutral level preferred by most microorganisms

  • 24. 
    Two important coenzymes that function inoxidative phosphorylation are
    • A. 

      ATP and acetyl CoA

    • B. 

      DNA and ATP

    • C. 

      NADP and ATP

    • D. 

      FAD and NAD+

  • 25. 
    Electrons for oxidative phosphorylation can originate from
    • A. 

      Only the Krebs cycle reactions

    • B. 

      Only the reactions of fermentation

    • C. 

      Only the reactions of glycolysis

    • D. 

      Both the krebs cycle and glycolysis reactions