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Microbiology: Core Concepts MCQs

Waraq MBBS Review: Microbiology · MBBS / Medicine · 15 practice questions

1. Gram-positive cocci in clusters that are coagulase positive are:

  1. AStreptococcus pyogenes
  2. BStaphylococcus aureus
  3. CEnterococcus
  4. DStaphylococcus epidermidis
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B. Staphylococcus aureus Coagulase separates S. aureus from other staphylococci.

2. Acid-fast bacilli are demonstrated by which stain?

  1. AGram
  2. BLeishman
  3. CZiehl-Neelsen
  4. DGiemsa
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C. Ziehl-Neelsen Mycobacteria resist decolourisation with acid-alcohol.

3. Which medium is used to grow Corynebacterium diphtheriae?

  1. ALoeffler serum slope
  2. BSabouraud agar
  3. CThayer-Martin agar
  4. DMacConkey agar
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A. Loeffler serum slope Loeffler medium and tellurite blood agar are used.

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