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Microbiology

Microbiology
The gram-positive bacteria lack __________ structure/component?

murein
teichoic acid
plasma membrane
outer membrane

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Microbiology
Too long a fermentation of sauerkraut may favour the growth of

none of these
Bacillus subtilis
Lactobacillus brevis
Lactobacillus lactis

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Microbiology
The bacteria, which is more resistant to adverse environmental conditions, is

S sonnei
S flexneri
S dysenteriae
S boydii

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Microbiology
Which of the following property(ies), shown by the organisms belong(s) to the family Enterobacteriaceae?

They are catalase-positive
They are oxidase-negative
All of these
They ferment glucose

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Microbiology
Selective media for the isolation of Shigella is

Xylose lysine deoxycholate agar
Hektoen enteric agar
Salmonella-Shigella agar
All of these

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Microbiology
Which of the following toxin causing botulism is less toxic to human beings?

Type C
Type A
Type B
None of these

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