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Home Q & A Board Biology-Related Homework Help General Biology
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ferry_L ferry_L
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6 years ago
Normal flora ________ colonization of pathogenic organisms.
 
  A) promote
  B) prevent
  C) maintain
  D) accelerate


Cytolytic toxins
 
  A) are extracellular proteins.
  B) cause cell lysis and death.
  C) damage host cytoplasmic membrane.
  D) are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane.


Siderophores from some pathogens remove iron from the host protein(s)
 
  A) lactoferrin.
  B) transferrin.
  C) both lactoferrin and transferrin.
  D) cytochromes.


Which of the following does NOT affect pathogen growth?
 
  A) availability of microbial nutrients
  B) pH
  C) temperature
  D) doubling time


Pathogenic strains of Escherichia coli usually express
 
  A) capsules.
  B) colonization factor antigens (CFA).
  C) plaques.
  D) slime layers.
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shy;shy;
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6 years ago
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ferry_L Author
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#2
6 years ago
Bravo! This is awesome
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