Microbiology Toughest Exam: Quiz!
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- 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
Questions: 45 | Attempts: 23246 | Last updated: Aug 20, 2020
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