Sem 3 BRS Micro - General Properties Of Microorganisms; /Bacteria

30 Questions | Total Attempts: 154

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Bacteria Quizzes & Trivia

Questions and Answers
  • 1. 
    A pharmaceutical company has developed a new compound that is well tolerated by the body and inhibits the sterol ergo sterol synthesis. Screening of anti-infectious agent activity should be directed toward
    • A. 

      Bacteria

    • B. 

      Chlamydia species

    • C. 

      Fungi

    • D. 

      Rickettsia species

    • E. 

      Viruses

  • 2. 
    50S ribosomal subunits are found in
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Prions

    • D. 

      Protozoa

    • E. 

      Viruses

  • 3. 
    The normal flora of the large intestine consists mainly of
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Protozoa

    • D. 

      Viruses

    • E. 

      No microbial agents

  • 4. 
    The minimal concentration of alcohol necessary to kill bacteria and enveloped viruses is
    • A. 

      30%

    • B. 

      40%

    • C. 

      50%

    • D. 

      60%

    • E. 

      70%

  • 5. 
    Human obligate intracellular pathogens that depend on the host cell for ATP production are
    • A. 

      Bacteriophages

    • B. 

      Mycoplasma species

    • C. 

      Prions

    • D. 

      Rickettsia species

    • E. 

      Viroids

  • 6. 
    Dimorphism is a characteristic of
    • A. 

      Bacteria

    • B. 

      Fungi

    • C. 

      Prions

    • D. 

      Rickettsia species

    • E. 

      Viruses

  • 7. 
    A new infectious agent has been isolated from deer ticks. It lacks a cell wall but has 70S ribosomes. This agent is most likely a
    • A. 

      Bacterium

    • B. 

      Chlamydia species

    • C. 

      Mycoplasma species

    • D. 

      Rickettsia species

    • E. 

      Virus

  • 8. 
    Chapter 2 BACTERIA A bacterial toxin with super antigen activity is produced by
    • A. 

      Clostridia tetani

    • B. 

      Bordetella pertussis

    • C. 

      Escherichia coli

    • D. 

      Staphylococcus aureus

    • E. 

      Vibrio cholera

  • 9. 
    Sugar transport into bacteria is frequently facilitated by
    • A. 

      Acetyl transferase

    • B. 

      Neuraminidases

    • C. 

      Oxidases

    • D. 

      Penicillin-binding proteins

    • E. 

      Phospho transferases

  • 10. 
    Thayer-Martin and Martin-Lewis media are used to isolate and identify E. coli
    • A. 

      E. coli

    • B. 

      Mycobacteria

    • C. 

      Neisseria

    • D. 

      Salmonella

    • E. 

      Shigella

  • 11. 
    B-lactamases confer antibiotic resistance by
    • A. 

      Altering antibiotic permeability

    • B. 

      Altering penicillin-binding proteins

    • C. 

      Altering 70S ribosome structure

    • D. 

      Modifying cellular RNA polymerase

    • E. 

      Modifying antibiotic structure

  • 12. 
    Polymers of N-acetyl glucosamine and N-acetyl  muramic acid are found in which of the following structures?
    • A. 

      Teichoic acid

    • B. 

      Cell wall

    • C. 

      Glycocalyx

    • D. 

      Lipopolysaccharide

  • 13. 
    A phage that is not inactivated by proteases is called a
    • A. 

      Prophage

    • B. 

      Virulent phage

    • C. 

      Temperate phage

    • D. 

      Filamentous phage

  • 14. 
    Bacteria that synthesize organic compounds from inorganic compounds are
    • A. 

      Heterotrophs

    • B. 

      Obligate anaerobes

    • C. 

      Aerobes

    • D. 

      Facultative anaerobes

    • E. 

      Autotrophs

  • 15. 
    A bacterial structure involved in adherence is
    • A. 

      Capsule

    • B. 

      Lipopolysaccharide

    • C. 

      Ordinary pili

    • D. 

      O-specific side-chain

    • E. 

      Teichoic acid

  • 16. 
    Aminoglycoside antibiotics are
    • A. 

      Bactericidal for Gram-positive bacteria

    • B. 

      Inactivated by R-factor phosphor transferases

    • C. 

      Mycolic acid synthesis inhibitors

    • D. 

      Peptidoglycan synthesis inhibitors

    • E. 

      Require bacterial growth for the effect

  • 17. 
    A-B subunit structure as it relates to bacterial pathogenesis refers to the structure of
    • A. 

      Bacterial exotoxins

    • B. 

      Gram-negative bacteria endotoxin

    • C. 

      Nucleic acid inhibitor antibiotics

    • D. 

      Penicillin-binding proteins

    • E. 

      Resistance transfer factors

  • 18. 
    Which of the following displays the Pasteur effect?
    • A. 

      Heterotrophs

    • B. 

      Obligate anaerobes

    • C. 

      Aerobes

    • D. 

      Facultative anaerobes

    • E. 

      Autotrophs

  • 19. 
    Which of the following toxins acts on synaptosomes?
    • A. 

      E. coli heat-labile toxin

    • B. 

      Clostridium tetani exotoxin

    • C. 

      Corynebacterium diphtheria exotoxin

    • D. 

      Pseudomonas aeruginosa exotoxin

    • E. 

      Clostridium perfringens alpha-toxin

  • 20. 
    Superoxide dismutase-containing bacteria
    • A. 

      Need superoxide to grow

    • B. 

      Are frequently obligate anaerobes

    • C. 

      Grow slowly in the presence of CO2

    • D. 

      Produce hydrogen peroxide from hydrogen ion and the superoxide free radical (O2-)

  • 21. 
    Lysogenic phage conversion involves
    • A. 

      The transformation of a virulent phage to a lysogenic phage

    • B. 

      A change in bacterial phenotype due to the presence of a prophage

    • C. 

      The conversion of a prophage to a temperate phage

    • D. 

      The incorporation of a prophage into the bacterial chromosome

  • 22. 
    Bacteria capable of growth in a high salt concentration are best isolated in which of the following media?
    • A. 

      Minimal growth media

    • B. 

      Complex growth media

    • C. 

      Differential growth media

    • D. 

      Selective growth media

  • 23. 
    Bacteria lacking superoxide dismutase are
    • A. 

      Heterotrophs

    • B. 

      Obligate anaerobes

    • C. 

      Aerobes

    • D. 

      Facultative anaerobes

    • E. 

      Autotrophs

  • 24. 
    The regulation of enzyme activity in bacterial cells can
    • A. 

      Be coupled to the binding of effector molecules

    • B. 

      Be controlled by a catabolite activator protein(CAP)

    • C. 

      Occur via attenuation sequences

    • D. 

      Involve inducer molecules

  • 25. 
    The plasma membrane
    • A. 

      Contains matrix porins

    • B. 

      Includes endotoxin

    • C. 

      Contains glycocalyx

    • D. 

      Contains the enzymes involved in bacterial oxidative phosphorylation

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