Discussion
Home ‣ Microbiology ‣ Microbiology of Soils Comments
- Question
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?
Options- A. Achromobacter
- B. Agrobacterium
- C. Alcaligenes
- D. None of these
- Correct Answer
- None of these
- 1. The conversion of molecular nitrogen into ammonia is known as
Options- A. nitrification
- B. denitrification
- C. nitrogen fixation
- D. ammonification Discuss
- 2. __________ play a key role in the transformation of rock to soil.
Options- A. Cyanobacteia
- B. Pectin decomposing bacteria
- C. Nitrifying bacteria
- D. De-nitrifying bacteria Discuss
- 3. The phenomenon of commensalism refers to a relationship between organisms in which
Options- A. one species of a pair benefits
- B. both the species of a pair benefit
- C. one species of a pair is more benefited
- D. none of the above Discuss
- 4. The microbial ecosystem of soil includes
Options- A. biotic components of soil
- B. abiotic components of soil
- C. biotic and abiotic components of soil
- D. none of the above Discuss
- 5. Which of the following is correct?
Options- A. Mycorrhizae are fungi that form a mutually beneficial (symbiotic) relationship with plant roots
- B. The fungi aid in transmitting nutrients and water to the plant roots
- C. The increased nutrient availability from mycorrhizae is thought to be due to the additional absorbing surface provided by the fungi
- D. All of the above Discuss
- 6. Bacteria, as a group, are responsible for
Options- A. nitrogen oxidation
- B. sulfur oxidation
- C. nitrogen fixation
- D. all of these Discuss
- 7. Which of the following is not the biofertilisers producing bacteria?
Options- A. Nostoc
- B. Anabaena
- C. Both (a) and (b)
- D. Clostridium Discuss
- 8. Denitrification is carried out
Options- A. usually by facultative anaerobes
- B. predominantly by Pseudomonas spp
- C. predominantly by Bacillus spp
- D. all of the above Discuss
- 9. The crops which are involved in nitrogen fixation are
Options- A. alfalfa and clover
- B. soybean
- C. bean and lupine
- D. all of these Discuss
- 10. Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into
Options- A. ammonia
- B. glucose
- C. ATP
- D. nitrate Discuss
Microbiology of Soils problems
Search Results
Correct Answer: nitrogen fixation
Correct Answer: Cyanobacteia
Correct Answer: one species of a pair benefits
Correct Answer: biotic and abiotic components of soil
Correct Answer: All of the above
Correct Answer: all of these
Correct Answer: Clostridium
Correct Answer: all of the above
Correct Answer: all of these
Correct Answer: ammonia
Comments
There are no comments.More in Microbiology:
Programming
Copyright ©CuriousTab. All rights reserved.