Discussion
Home ‣ Microbiology ‣ Microbiology of Soils Comments
- Question
The population of algae in soil is __________ that of either bacteria or fungi.
Options- A. generally smaller than
- B. generally greater than
- C. equal to
- D. none of these
- Correct Answer
- generally smaller than
- 1. The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as
Options- A. nitrification
- B. denitrification
- C. nitrogen fixation
- D. ammonification Discuss
- 2. The groups of bacteria which have the ability to fix nitrogen from air to soil are
Options- A. symbiotic
- B. nonsymbiotic
- C. both (a) and (b)
- D. none of these Discuss
- 3. The diagnostic enzyme for nitrogen-fixing organisms is
Options- A. nitrogenase
- B. nitrate reductase
- C. nitrate oxidase
- D. none of these Discuss
- 4. A heterocyst is
Options- A. a type of spore
- B. a terminally differentiated cell that fixes nitrogen
- C. the progenitor of cyanobacterial vegetative cells
- D. a cell that carries out oxygenic photosynthesis Discuss
- 5. Some microorganisms have the ability to increase the nitrogen content of soils, are called as
Options- A. nitrogen fixation
- B. denitrification
- C. nitrification
- D. all of these Discuss
- 6. The nonsymbiotic bacteria which fix nitrogen live in the soil independently are
Options- A. Azotobacter
- B. Clostridium
- C. considerably less important in comparison to the symbiotic bacteria
- D. all of the above Discuss
- 7. For rapid decomposition by microbes, the substrate should have a C/N ratio of
Options- A. 10-20
- B. 20-30
- C. 30-40
- D. 60-80 Discuss
- 8. Degree of compost maturity can be assesed by
Options- A. infrared technique
- B. germination test
- C. both (a) and (b)
- D. none of the above Discuss
- 9. Assimilative denitrification is done by
Options- A. plants
- B. fungi
- C. prokaryotes
- D. all of these Discuss
- 10. The physical structure of soil is improved by the accumulation of
Options- A. mold mycelium
- B. minerals
- C. water
- D. all of these Discuss
Microbiology of Soils problems
Search Results
Correct Answer: denitrification
Correct Answer: both (a) and (b)
Correct Answer: nitrogenase
Correct Answer: a terminally differentiated cell that fixes nitrogen
Correct Answer: nitrogen fixation
Correct Answer: all of the above
Correct Answer: 30-40
Correct Answer: both (a) and (b)
Correct Answer: all of these
Correct Answer: mold mycelium
Comments
There are no comments.More in Microbiology:
Programming
Copyright ©CuriousTab. All rights reserved.