Which of the following is necessary for biological nitrogen fixation?
Lecturer Botany Past Papers and Syllabus / All — Multiple-choice practice
حیاتیاتی نائٹروجن طے کرنے کے لئے مندرجہ ذیل میں سے کون سا ضروری ہے؟
- A. Zinc
- B. Molybdenum
- C. None of these
- D. Calcium
Correct answer
Molybdenum
Explanation
Explanation Nitrogenase enzyme requires molybdenum. It helps convert atmospheric N₂ into ammonia. Leguminous plants rely on this process. Deficiency reduces nitrogen fixation. I t is essential for symbiotic bacteria in root nodules. Last updated question 17-02-2026
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