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Microbiology

Microbiology
The bacteria which produce(s) β-galactosidase is/are

all of these
Enterohacter
Citrobacter
Serratia

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Microbiology
Species of Shigella which is predominant in India is

S sonnei
S dysenteriae
S boydii
S flexneri

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Microbiology
Heat-stable enterotoxin of Escherichia coli activates

both of the above
adenylate cyclase
none of these
guanylate cyclase

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Microbiology
An excessively high temperature in the fermentation of sauerkraut may inhibit the growth of

both (a) and (b)
Pediococcus cerevisiae
Leuconostoc
none of these

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Microbiology
In Widal test the significant titres for H agglutinins is

1:100 ormore
1:50 or more
1:200 or more
1:400 or more

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Microbiology
Which of the following serotypes of Salmonella does not produce H2S?

Both (a) and (b)
S choleraesuis
S paratyphi A
None of these

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