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NEET Previous Year Question

$One of the free-living, anaerobic nitrogenfixer is:$

Topic: NEET PYQ

Answer: C. Full step-by-step solution below.

A $Azotobacter$
B $Beijernickia$
C $Rhodospirillum$
D $Rhizobium$

Correct answer: C

Solution

(c) Rhodospirillum is a free-living anaerobic nitrogen-fixing bacterium. Azotobacter and Beijerinckia are aerobic nitrogen fixers. Rhizobium is symbiotic, not free-living.

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