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Microbiology Mcqs

Which of the following characteristics of bacteria is not true?

  • (A)  Unicellular
  • (B)  Free living
  • (C)  Having either DNA or RNA
  • (D)  Cell wall containing muramic acid
Submitted By :Ali Uppal


The single most important laboratory test for determining the virulence of staphylococci is___________?

  • (A)  Mannitol fermentation
  • (B)  Hemolysis of sheep erythrocytes
  • (C)  Detection of coagulase
  • (D)  The catalase test
Submitted By :Ali Uppal


Which of the following have the capability to produce extra cellular polysaccharides______________?

  • (A)  Strep. Mutans
  • (B)  Strep. pyogenes
  • (C)  Peptostreptococcus
  • (D)  Enterococcus
Submitted By :Ali Uppal


Tuberculin test screens for_____________?

  • (A)  Hemoral immunity
  • (B)  Cell mediated immunity
  • (C)  Complement function
  • (D)  Phagocyte dysfunction
Submitted By :Ali Uppal


Granules in the corynebacterium diphtheria are called by following names, except______________?

  • (A)  Metachromatic granules
  • (B)  Refractile granules
  • (C)  Babes Ernst granules
  • (D)  Voluntin granules
Submitted By :Ali Uppal


Widal test is specific for____________?

  • (A)  Plague
  • (B)  Leprosy
  • (C)  Pemhigoid
  • (D)  Typhoid
Submitted By :Ali Uppal


Culture medium for corynebacterium diphtheria______________?

  • (A)  Loefflers serum slope
  • (B)  Mc Conkey
  • (C)  Saborauds agar
  • (D)  Lowenstein Jensen Medium
Submitted By :Ali Uppal


Virulence of Gonococcus is due to___________________?

  • (A)  Pili
  • (B)  Cell Membrane
  • (C)  Its intracellular location
  • (D)  Cytolytic enzymes
Submitted By :Ali Uppal


Which regards to temperature requirement, most pathogenic bacteria are_____________?

  • (A)  Psychrophiles
  • (B)  Mesophiles
  • (C)  Cryophiles
  • (D)  Thermophiles
Submitted By :Ali Uppal


A protoplast is best characterized as a bacterial cell______________?

  • (A)  with a cell wall but free of a capsule
  • (B)  containing a cell wall and a capsule
  • (C)  Free of a cell wall and a capsule
  • (D)  Uniquely sensitive to penicillin
Submitted By :Ali Uppal