Microbiology - Microbiology of Soils

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Exercise :: Microbiology of Soils - Section 1

  • Microbiology of Soils - Section 1
1. 

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

A. Azotobacter
B. Clostridium
C. considerably less important in comparison to the symbiotic bacteria
D. all of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

2. 

Nitrogen fixation by the microorganisms can be detected by adopting the approach of

A. demonstrating growth in a nitrogen free medium
B. cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen
C. measuring15N2 by mass spectrometer
D. all of the above

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

Which of the following is not the biofertilisers producing bacteria?

A. Nostoc
B. Anabaena
C. Both (a) and (b)
D. Clostridium

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

4. 

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

A. Thiobacillus thiooxidans
B. Desulfotomaculum
C. Rhodospirillum
D. Rhodomicrobium

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

5. 

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

A. ingestion of bacteria
B. ingestion of mold
C. ingestion of fungi
D. all of these

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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