Question

In which region of leguminous plants are nitrogen fixing bacteria found ?

• A. Leaves
• B. Root nodules
• C. Stem
• D. Flowers

Answer 1

The correct option is B

Root nodules

The correct option is B:

1. Certain bacteria or prokaryotes are capable of converting atmospheric nitrogen to ammonia.
2. This process is called biological nitrogen fixation.
3. The enzyme nitrogenase converts dinitrogen to ammonia.
4. Nitrogen-fixing bacteria may be free-living or symbiotic.
5. Some of the free-living nitrogen fixers are Azotobacter, Rhodospirillum, cyanobacteria, etc.
6. Examples of symbiotic nitrogen fixers are Rhizobium (in the root nodules of legumes) and Frankia (in the root nodules of non-leguminous plants), etc.