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Microbiology of Soils

Microbiology of Soils
The nitrogenase consists of

dinitrogenase
none of these
dinitrogenase reductase
both (a) and (b)

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitro oxidoreductase
nitrate oxidase
nitrate reductase

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Microbiology of Soils
Denitrification is carried out

predominantly by Pseudomonas spp
All of these
predominantly by Bacillus spp
usually by facultative anaerobes

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Thiobacillus thiooxidans
Desulfotomaculum
Rhodospirillum
Rhodomicrobium

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

considerably less important in comparison to the symbiotic bacteria
Azotobacter
All of these
Clostridium

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Microbiology of Soils
Which are the main source of biofertilisers?

Bacillus
Streptococcus
None of these
Cyanobacteria

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