Multiple choice

Most famous symbiotic nitrogen fixing bacteria is:

  1. Rhizobium

  2. Nitrosomonas

  3. Nitrobactor

  4. Nitrococcus
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A Correct answer
Explanation

Rhizobium is the most well-known symbiotic nitrogen-fixing bacterium, forming mutualistic associations with legume plants in root nodules. The bacteria convert atmospheric nitrogen into ammonia that the plant can use, while receiving carbohydrates from the plant. Nitrosomonas and Nitrobacter are involved in nitrification, not nitrogen fixation.

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