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Microbiology Mcqs

The mechanism of genetic transfer where a phage serves as a vehicle is_______________?

  • (A)  Transduction
  • (B)  Translation
  • (C)  Lysogeny
  • (D)  Conjugation
Submitted By :Ali Uppal


Fimbriae are demonstrated by ___________________?

  • (A)  Culture
  • (B)  Gram stain
  • (C)  Biochemical reaction
  • (D)  Haemagglutination test
Submitted By :Ali Uppal


Staphylococcal food poisoning includes the following features_______________?

  • (A)  Incubation period of 24 hours
  • (B)  Requires immediate antibiotics
  • (C)  Common with dairy products
  • (D)  Heat labile enterotoxin
Submitted By :Ali Uppal


Phospholipid used to investigate syphilis by the reagin test is________________?

  • (A)  Cardiolipin
  • (B)  Plasminogen
  • (C)  Palmityl lecithin
  • (D)  Serine
Submitted By :Ali Uppal


In small intestine, cholera toxin acts by______________?

  • (A)  ADP – ribosylation of the G regulatory protein
  • (B)  Inhibition of adenyl cyclase
  • (C)  Activation of GTPase
  • (D)  Active absorption of NaCI
Submitted By :Ali Uppal


The most frequently encountered clostridial species in gas gangrene is______________?

  • (A)  Clostridium botulinum
  • (B)  Clostridium welchii
  • (C)  Clostridium tetani
  • (D)  Clostridium difficile
Submitted By :Ali Uppal


Group A carbohydrate of Str. pyogenes cross reacts with human_________________?

  • (A)  Synovial fluid
  • (B)  Myocardium
  • (C)  Cardiac valves
  • (D)  Vascular intima
Submitted By :Ali Uppal


ASO (Antistreptolysin 0) test is uesd for the diagnosis of________________?

  • (A)  Rheumatoid arthritis
  • (B)  Typhoid fever
  • (C)  Rheumatie fever
  • (D)  Rickettsial fever
Submitted By :Ali Uppal


Following are the characteristics of Vincent’s angina EXCEPT_______________?

  • (A)  Ulcerative gingivostomatitis
  • (B)  Caused due to malnutrition
  • (C)  A symbiotic infection
  • (D)  Caused by leptospira interrogans
Submitted By :Ali Uppal


Pathogenesis of diphtheria is attributed to__________________?

  • (A)  Invasion
  • (B)  Endotoxin
  • (C)  Exotoxin
  • (D)  Capsule
Submitted By :Ali Uppal