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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

dissimilative
both (a) and (b)
assimilative
blue baby syndrome

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

Thiobacillus thiooxidans
Desulfotomaculum
Rhodomicrobium
Rhodospirillum

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

None of these
Alcaligenes
Agrobacterium
Achromobacter

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

none of these
fast growth
slow growth
medium growth

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Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

ingestion of fungi
ingestion of mold
all of these
ingestion of bacteria

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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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