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Question
Which of the following is non-symbiotic nitrogen fixer organism?
Which of the following is non-symbiotic nitrogen fixer organism?
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Solution
The correct option is B Azotobacter
- Azotobacter is a free-living obligate aerobic rod-shaped soil bacteria. It fixes the atmospheric nitrogen which is inaccessible to the plants into the soil.
- It does not reside in the roots of the plant. It remains in the soil and converts the atmospheric nitrogen into the soluble form, ammonium ions.
- It has the unusual ability to fix atmospheric nitrogen as it produces nitrogenase enzyme and convert it to ammonia.
Thus, the correct answer is option B.
- Azotobacter is a free-living obligate aerobic rod-shaped soil bacteria. It fixes the atmospheric nitrogen which is inaccessible to the plants into the soil.
- It does not reside in the roots of the plant. It remains in the soil and converts the atmospheric nitrogen into the soluble form, ammonium ions.
- It has the unusual ability to fix atmospheric nitrogen as it produces nitrogenase enzyme and convert it to ammonia.
Thus, the correct answer is option B.
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