4T051O Practice Test

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  • 1 . In the deoxyribonucleic acid (DNA) strand, the purine bases are attached to a backbone made of
    phosphate and sugar
  • 2 . Erythromycin is one of four closely related antibiotics of the macrolide class that are produced by
    Streptomyces erythraeus
  • 3 . The purpose of selective media is to
    inhibit the growth of certain organisms while permitting the growth of others
  • 4 . The discovery of infectious agents was long preceded by the concept of
    contagious disease
  • 5 . The phenetic classification of bacteria is based on
    easily recognizable characteristics that are weighed in importance
  • 6 . Failure to ferment xylose in xylose lysine desoxycholate (XLD) agar results in
    alkalinization of the medium
  • 7 . Antifungal macrolides are
    quite unstable when exposed to ultraviolet (UV) light and mild detergents
  • 8 . What antibiotic is in the glycopeptide group?
    Vancomycin
  • 9 . What type of tissue can C. trachomatis infect?
    Columnar epithelial
  • 10 . The first notable observation of microbes was made by
    Anton van Leeuwenhoek.