microbiology-microbiology-of-soils Related Question Answers
1. Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?
2. Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to
3. Bacteria, as a group, are responsible for
4. The phenomenon of commensalism refers to a relationship between organisms in which
5. The population of algae in soil is __________ that of either bacteria or fungi.
6. The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as
7. Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into
8. The diagnostic enzyme for denitrification is
9. A heterocyst is
10. The groups of symbiotic bacteria, which have the ability to fix nitrogen
11. Nitrogen oxidation (nitrification)refers to the
12. An example of a symbiotic nitrogen fixer is
13. In the process of nitrogen fixation, which of the following microorganism is involved?
14. Which of the following statement is not true about composition of biogas?
15. The physical structure of soil is improved by the accumulation of
16. __________ play a key role in the transformation of rock to soil.
17. The groups of bacteria which have the ability to fix nitrogen from air to soil are
18. The nitrogenase consists of
19. The crops which are involved in nitrogen fixation are
20. Denitrification may be distinguished as
21. The conversion of molecular nitrogen into ammonia is known as
22. The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?
23. Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?
24. Some microorganisms have the ability to increase the nitrogen content of soils, are called as
25. Nitrogen fixation
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