Q.Explain biological nitrogen fixation with example.
You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
Start your 14-day free trial to unlock the full solution →Biological nitrogen fixation is carried out by diazotrophs such as Rhizobium, which forms root nodules on legumes and converts N2 to ammonia using 16 ATP per N2 fixed.
Step 1. Definition. Biological nitrogen fixation is the conversion of inert atmospheric N2 into ammonia, carried out by prokaryotes called nitrogen fixers or diazotrophs, which account for nearly 70% of all natural nitrogen fixation.
Step 2. Free-living vs symbiotic fixers. Diazotrophs may be free-living (e.g. cyanobacteria, which fix nitrogen in specialised cells called heterocysts) or symbiotic, living in a mutually beneficial association with a host plant. …
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.