MCQs on Medical Microbiology

Sourav Bio

1. Which of the following is an example of live vaccine?

  • Pertussis
  • Cholera
  • Measles
  • Rubella
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2. Triple toxoid vaccine gives protection against

  • Diphtheria, tetanus and rabies
  • Tetanus, whooping cough, Tuberculosis
  • Whooping cough, tetanus and Diphtheria
  • Whooping cough, cancer and T.B.

3. All of the following are bacteriostatic chemotherapeutic agents except

  • Novobiocin
  • Bacitracin
  • Chloramphenicol
  • Tetracyclines

4. Of which Clostridia, the Neurotoxin is most powerful?

  • Cl. tetani
  • Cl. perfringens
  • Cl. botulinum
  • Cl. defficile

5. Causative agent of Scarlet fever:

6. Toxic shock syndrome is caused by

  • Staph. aureus
  • Staph. albus
  • Strep. pneumoniae
  • Strep. pyogenes

7. Septicaemia is

  • Bacteria in blood
  • Toxin in blood
  • Multiplication of bacteria and toxins in blood
  • None of these

8. The suitable assay method for antibiotics is

  • Enzymatic assay
  • Turbidometric assay
  • Metabolic assay
  • End point determination assay

9. Penicillin is a

  • Primary metabolite
  • Secondary metabolite
  • Tertiary metabolite
  • None of these

10. Higher does of chloramphenicol affects the eukaryotic cells because

  • They have 30 S ribosomes
  • They have mitochondria
  • They have 70 S ribosomes
  • None of the above


1. Cholera, 2. Whooping cough, tetanus and Diphtheria, 3. Chloramphenicol, 4. Cl. botulinum, 5. Streptococcus pyogenes, 6. Staph. aureus, 7. Multiplication of bacteria and toxins in blood, 8. End point determination assay, 9. Secondary metabolite, 10. They have mitochondria.

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