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MCQs

Total Questions : 29 | Page 1 of 3 pages
Question 1. Lactobacilli grow best under
  1.    microaerophilic conditions in presence of 3% CO2 and PH5
  2.    strict anaerobic conditions
  3.    microaerophilic conditions in presence of 2% CO2 and PH4
  4.    microaerophilic conditions in presence of 5% CO2 and PH6
 Discuss Question
Answer: Option D. -> microaerophilic conditions in presence of 5% CO2 and PH6
Question 2. The current genus name of a saccharolytic group of Bacteroides is
  1.    Porphyromonas
  2.    Bacteroides
  3.    Prevotella
  4.    None of these
 Discuss Question
Answer: Option A. -> Porphyromonas
Question 3. The bacteria which is predominant flora of the human gut is
  1.    Bacteroides
  2.    Actinomyces
  3.    Clostridium perfringens
  4.    Escherichia coli
 Discuss Question
Answer: Option C. -> Clostridium perfringens
Question 4. Which of the following genera is included in the family Bacteroi-daceae?
  1.    Leptotrichia
  2.    All of these
  3.    Bacteroides
  4.    Fusobacterium
 Discuss Question
Answer: Option B. -> All of these
Question 5. Colonies resembling molar teeth are produced by
  1.    Actinomadura madurae
  2.    Actinomyces israelii
  3.    N. asteroids
  4.    Nocardia brasiliensis
 Discuss Question
Answer: Option B. -> Actinomyces israelii
Question 6. Lactobacilli constitute the normal flora of
  1.    post-menopausal vagina
  2.    adult vagina
  3.    prepubertal vagina
  4.    none of these
 Discuss Question
Answer: Option B. -> adult vagina
Question 7. Which of the following bacteria is gram-negative cocci?
  1.    Sporosarcina
  2.    Peptococcus
  3.    Veillonella
  4.    Peptostreptococcus
 Discuss Question
Answer: Option C. -> Veillonella
Question 8. Which of the following bacteria is acid-fast?
  1.    Corynebacterium
  2.    Actinomyces
  3.    Nocardia
  4.    Streptomyces
 Discuss Question
Answer: Option C. -> Nocardia
Question 9. Which of the following bacterial colonies fluoresce brick-red in UV light?
  1.    B gingivalis
  2.    B melaninogenicus
  3.    Bacteroides fragilis
  4.    B levii
 Discuss Question
Answer: Option B. -> B melaninogenicus
Question 10. The commonest species of Bacteroides in fragilis group, which causes human infection, is
  1.    B fragilis
  2.    B vulgatus
  3.    B merdae
  4.    B ovatus
 Discuss Question
Answer: Option A. -> B fragilis

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