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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Anabaena
Both (a) and (b)
Clostridium
Nostoc

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

Rhodospirillum
Thiobacillus thiooxidans
Desulfotomaculum
Rhodomicrobium

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

ammonia
nitrate
glucose
ATP

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Microbiology of Soils
Which of the following statement is not true about composition of biogas?

It also contains with traces of O2 and Cl2
Both (a) and (b)
It also contains with traces of H2S, N2, H2and CO
It is composed almost exclusively of methane and carbon dioxide

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Microbiology of Soils
Assimilative denitrification is done by

fungi
prokaryotes
plants
all of these

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Microbiology of Soils
Which are the main source of biofertilisers?

Bacillus
None of these
Streptococcus
Cyanobacteria

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