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Microbiology

Microbiology
Bacteria are

symbiotic
saprophytic
hyper parasitic
all of these

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Microbiology
The most important bacterium developing acidity in both low and high salt brines is

L. lactis
B. subtilis
L. brevis
L. plantarum

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Microbiology
Which of the following is/are not a gram-positive bacteria?

None of these
Pseudomonas
Streptococci
Mycobacteria

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Microbiology
Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because

it is selective
it is less inhibitory to S. Dysentriae and S. flexneri
it contains high salt concentration
it imparts better growth

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Microbiology
Which of the following genus belongs to family Spirochaetaceae?

Spirochaeta
All of these
Treponema
Borrelia

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Microbiology
In Widal test, the significant titre for O agglutinins is generally

1:150 or more
1:2.00 or more
1:50 or more
1:100 or more

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