First slide

Metabolism of Nitrogen

Question

One of the free-living, anaerobic nitrogen fixers is:

Easy

A

Azotobacter
B

Rhodospirillum
C

Beijernickia
D

Rhizobium

Solution

The nitrogen-fixing microbes could be free-living or symbiotic. Examples of free-living nitrogen-fixing aerobic microbes are Azotobacter and Beijerinckia while Rhodospirillum is anaerobic and free-living.
Rhizobium shows symbiotic biological nitrogen fixation.

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