1. Lactobacilli grow best under
A.strict anaerobic conditions
B.microaerophilic conditions in presence of 5% CO2 and PH6
C.microaerophilic conditions in presence of 3% CO2 and PH5
D.microaerophilic conditions in presence of 2% CO2 and PH4

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2.  Which of the following genera is included in the family Bacteroi-daceae?
A.Bacteroides
B.Fusobacterium
C.Leptotrichia
D.All of these

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3. The bacteria which is predominant flora of the human gut is
A.Escherichia coli
B.Clostridium perfringens
C.Bacteroides
D.Actinomyces

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4. The current genus name of a saccharolytic group of Bacteroides is
A.Porphyromonas
B.Bacteroides
C.Prevotella
D.None of these

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5. Colonies resembling molar teeth are produced by
A.Nocardia brasiliensis
B.N. asteroids
C.Actinomyces israelii
D.Actinomadura madurae

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6. Which of the following bacterial colonies fluoresce brick-red in UV light?
A.B gingivalis
B.B melaninogenicus
C.Bacteroides fragilis
D.B levii

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7. Which of the following bacteria is acid-fast?
A.Actinomyces
B.Nocardia
C.Streptomyces
D.Corynebacterium

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