20) Examine the graph and determine the approximate ID50 of the virus.
A. 10 particles
B. 5000 particles
C. 13,000 particles
D. cannot be determined from the data collected
21) Examine the graph and determine the LD50 of the virus.
A. 10 particles
B. 5000 particles
C. 13,000 particles
D. cannot be determined from the data collected
22) Identify which pathogen is the least virulent on the basis of ID50.
A. pathogen A with an ID50 of 1000 cells
B. pathogen B with an ID50 of 50 cells
C. pathogen C with an ID50 of 1 cell
D. pathogenicity cannot be determined from ID50 values
23) Which describes the condition in which blood contains actively dividing bacteria?
A. bacteremia
B. septicemia
C. toxemia
D. viremia
24) Hyaluronidase is which type of exoenzyme?
A. glycohydrolase
B. nuclease
C. phospholipase
D. protease
25)What is the toxic component of endotoxin?
A. lipid A
B. the core oligosaccharide
C. the O-antigen
D. the peptidoglycan subunits
26)Which toxin inhibits the release of glycine and GABA at the neuromuscular junction, thus preventing the relaxation of muscles?
A. anthrax
B. botulinum
C. diphtheria
D. tetanus
27) All pathogens satisfy Kochâs postulates.
True
False
28) Which of the following is not a type of cell junction?
centromere
desmosome
gap
tight
29) Which cells produce and secrete mucus?
ciliated epithelial cells
goblet cells
keratinized squamous epithelial cells
Peyerâs patches
20) Examine the graph and determine the approximate ID50 of the virus.
A. 10 particles
B. 5000 particles
C. 13,000 particles
D. cannot be determined from the data collected
21) Examine the graph and determine the LD50 of the virus.
A. 10 particles
B. 5000 particles
C. 13,000 particles
D. cannot be determined from the data collected
22) Identify which pathogen is the least virulent on the basis of ID50.
A. pathogen A with an ID50 of 1000 cells
B. pathogen B with an ID50 of 50 cells
C. pathogen C with an ID50 of 1 cell
D. pathogenicity cannot be determined from ID50 values
23) Which describes the condition in which blood contains actively dividing bacteria?
A. bacteremia
B. septicemia
C. toxemia
D. viremia
24) Hyaluronidase is which type of exoenzyme?
A. glycohydrolase
B. nuclease
C. phospholipase
D. protease
25)What is the toxic component of endotoxin?
A. lipid A
B. the core oligosaccharide
C. the O-antigen
D. the peptidoglycan subunits
26)Which toxin inhibits the release of glycine and GABA at the neuromuscular junction, thus preventing the relaxation of muscles?
A. anthrax
B. botulinum
C. diphtheria
D. tetanus
27) All pathogens satisfy Kochâs postulates.
True
False
28) Which of the following is not a type of cell junction?
centromere
desmosome
gap
tight
29) Which cells produce and secrete mucus?
ciliated epithelial cells
goblet cells
keratinized squamous epithelial cells
Peyerâs patches
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