NEET UG 2025 · Botany · Question 113
NEET 2025 Botany, question 113
Question 113 of the NEET 2025 paper (code 45) is a Botany question from Mineral Nutrition. Its idea, Cyanobacterial N2 Fixers, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q113 · Botany
Which of following organisms *cannot* fix nitrogen?
A. *Azotobacter*
B. *Oscillatoria*
C. *Anabaena*
D. *Volvox*
E. *Nostoc*
Choose the *correct* answer from the options given below:
- 1A only
- 2D onlyOfficial answer
- 3B only
- 4E only
Official answer: option 2 · NTA final answer key
Same idea
The only question on Cyanobacterial N2 Fixers
No other NEET paper from 2017–2026 tested this exact idea.
Cyanobacterial N2 Fixers: every question and how it was framed
The chapter
Mineral Nutrition in ten years of NEET
12 questions from 2017–2026, asked in 8 of 10 papers, about 1.1 a paper. Nitrogen Fixation alone had 6.