Microbiology Toughest Exam: Quiz!

50 Questions | Total Attempts: 80

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Microbiology Toughest Exam: Quiz!

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Questions and Answers
  • 1. 
    Bacteria most likely to cause sepsis.
    • A. 

      E. Coli

    • B. 

      Staph Aureus

    • C. 

      Strep Pyogenes

    • D. 

      Clostridium Difficle

    • E. 

      A and B

    • F. 

      None of the above

  • 2. 
    Disinfectant effectiveness is determined by killing effectiveness of:
    • A. 

      Mycobactrium Tuberculosis

    • B. 

      Helicobacter Pylori

    • C. 

      Clostridium Difficle

    • D. 

      Bacillus sterothermophillus

  • 3. 
    The greatest risk of bloodborne infections among healthcare workers:
    • A. 

      Pseudomonas Aeruginosa

    • B. 

      HBV

    • C. 

      HIV

    • D. 

      Mycobacterium Tuberculosis

  • 4. 
    Peptidoglycan is a cross-linked polysaccharide of:
    • A. 

      N acetylmuramic and N acetylgalatose residues

    • B. 

      N acetylgalactose and N acetylglucosamine residues

    • C. 

      N acetylmuramic and N acetylglucosamine residues

  • 5. 
    DNA transfer via virus/bacteriophage:
    • A. 

      Translation

    • B. 

      Transduction

    • C. 

      Transposon

    • D. 

      Conjugation

    • E. 

      Transformation

    • F. 

      Transfection

  • 6. 
    What does Tetanus toxin do?
    • A. 

      Inhibits glycine release

    • B. 

      Inhibits protein synthesis

    • C. 

      Inhibit acetylchonine release

    • D. 

      Promotes cytokine release from t cells

  • 7. 
    Which toxin promotes cytokine release from t cells?
    • A. 

      Alpha toxin

    • B. 

      Diptheria toxin

    • C. 

      Botulinium toxin

    • D. 

      TSST

  • 8. 
    What does erythrogenic toxin cause?
    • A. 

      Degrades IgA

    • B. 

      Inhibits complement

    • C. 

      Destroys PMN

    • D. 

      Causes Scarlet Fever

    • E. 

      Causes Scalded Skin Syndrome

  • 9. 
    What type of hemolysis do Streptolysin O, Streptolysin S, and Pneumolysin cause?
    • A. 

      Alpha- hemolysis (partial)

    • B. 

      Beta - hemolysis (complete)

    • C. 

      Gama - hemolysis (none)

  • 10. 
    Which of the following is true of endotoxin?
    • A. 

      Located within the bacterial cell membrane

    • B. 

      It is lippopolysaccaride

    • C. 

      Lipid A is the toxic component

    • D. 

      Found only in Gram negative bactria

  • 11. 
    Which of the following are obligate intracellular bacteria?
    • A. 

      Spirocettes

    • B. 

      Neissera gonorehea

    • C. 

      Rickettisa

    • D. 

      Chlamydia sp.

  • 12. 
    Which of the following bacteria do not have a rigid and thick cell wall?
    • A. 

      Actinomyces isreales

    • B. 

      Mycoplasma

    • C. 

      Spirocettes

    • D. 

      Salmonella

  • 13. 
    Which of the following are distinguishing features of Mycobacteria species?
    • A. 

      They stain via acid fast staining

    • B. 

      They lack a cell wall

    • C. 

      Has mycolic acid in its cell wall instead of peptidglycan

  • 14. 
    What do obligate anaerobes lack which is responsible for they need to live in oxygen-free environments?
    • A. 

      A cell wall

    • B. 

      Factor IX (Christmas factor)

    • C. 

      Glyceraldegyde 6 phosphate dehydrogenase

    • D. 

      Superoxide dismutase and catalase

  • 15. 
    All Streptococci species are catalase-negative and gram-positive.
    • A. 

      True

    • B. 

      False

  • 16. 
    Group A Beta Hemolytic Streptococci are distinguished by which of the following:
    • A. 

      M protein on outer surface of cell

    • B. 

      C Carbohydrate composition of cell wall

    • C. 

      None of the above

  • 17. 
    Which is true of Beta Hemolytic Streptococci:
    • A. 

      All have C Carbohydrate composition of cell wall

    • B. 

      They are also called the Lancefield group

    • C. 

      They undergo beta hemolysis

  • 18. 
    Which of the following Strep species undergo beta hemolysis?
    • A. 

      Step viridans

    • B. 

      Strep pyogenes

    • C. 

      Strep agalactae

    • D. 

      Strep bovis

    • E. 

      Enterococci

    • F. 

      Strep pnemonae

  • 19. 
    All Clostridium species are obligate anaerobic.
    • A. 

      True

    • B. 

      False

  • 20. 
    Which of the following are major virulence factors for Streptococcus pyogenes:
    • A. 

      Protein A

    • B. 

      Hyauronidase

    • C. 

      Streptokinase

    • D. 

      Erythrogenic toxin

    • E. 

      Streptolysin O and S

    • F. 

      Exotoxin O and S

    • G. 

      Beta lactamase

    • H. 

      TSST

    • I. 

      Exfoliatin

    • J. 

      Entrotoxin

  • 21. 
    Which of the following are major virulence factors for Staphylococcus aureus:
    • A. 

      Protein A

    • B. 

      Hyauronidase

    • C. 

      Staphylokinase

    • D. 

      Beta lactamase

    • E. 

      TSST

    • F. 

      Exfoliatin

    • G. 

      Enterotoxin

  • 22. 
    Streptococcus pyogenes causes:
    • A. 

      Scarlet Fever

    • B. 

      Toxic Shock Syndrome

    • C. 

      Scalded skin syndrome

    • D. 

      Rheumatic fever

    • E. 

      A and D

    • F. 

      B and C

  • 23. 
    Stapylococcus aureus causes:
    • A. 

      Scarlet Fever

    • B. 

      Toxic Shock Syndrome

    • C. 

      Scalded skin syndrome

    • D. 

      Rheumatic fever

    • E. 

      A and D

    • F. 

      B and C

  • 24. 
    Bacterial that causes caries:
    • A. 

      Strep viridans

    • B. 

      Strep pyogenes

    • C. 

      Strep agalactae

    • D. 

      All of the above

  • 25. 
    Bacteria that have IgA protease:
    • A. 

      Streptococcus pneumoniae

    • B. 

      Haemophilus influenzae

    • C. 

      Neisseria (N. gonorrhoeae, N. meningitidis)

    • D. 

      All of the above