A. Methylene blue dextrose agar
B. Saboraud’s medium
C. Pingolevin
D. All of the above
✅ The correct answer is option Saboraud’s medium.
Microbiology MCQs
372. Sclerotic bodies measuring 3-5m in size, multi-septate, chestnut, brown color is characteristic of________________?
A. Histoplasmosis
B. Rhinosporodiosis
C. Phaeohypomycosis
D. Chromoblastomycosis
✅ The correct answer is option Chromoblastomycosis.
373. The Ig found in exocrine secretions is_____________?
A. IgG
B. IgD
C. IgM
D. IgA
✅ The correct answer is option IgA.
374. The optimal time and temperature required for sterilization in an autoclave is___________________?
A. 140°C x 2 hrs. x 10 lbs pr.
B. 121°F x 15 mts. x 15 lbs pr.
C. 121°F x 15 se x 15 lbs pr.
D. 121°C 15 mts. x 15 lbs pr.
✅ The correct answer is option 121°C 15 mts. x 15 lbs pr..
375. All of the following lab tests can be used to distinguish streptococcus mutans from other oral streptococci, except______________?
A. Gram staining
B. Fermentation of mannitol and sorbital
C. Production of intracellular and extracellular adherent polysacharide
D. Colony morphology on saliva agar
✅ The correct answer is option Gram staining.
376. 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
✅ The correct answer is option Having either DNA or RNA.
377. Which is not true about vibrio cholera_________________?
A. It is non-halophilic
B. Grows on simple media
C. Man is the only natural host
D. Cannot survive in extracellular environment
✅ The correct answer is option Cannot survive in extracellular environment.
378. 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
✅ The correct answer is option ADP – ribosylation of the G regulatory protein.
379. Following is a retrovirus_____________?
A. Immunodeficiency virus
B. Influenza
C. Polio virus
D. Hepatitis virus
✅ The correct answer is option Immunodeficiency virus.
380. Antigen used in Weil-Felix reaction______________?
A. E.coli
B. Haemophilus
C. Proteus
D. Staphylococcus
✅ The correct answer is option Proteus.