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Q. Which of the following elements play an important role in Biological Nitrogen Fixation?
  1. Iron
  2. Molybdenum
  3. Magnesium
Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Iron and Molybdenum are essential for Biological Nitrogen Fixation as components of the nitrogenase enzyme, which catalyzes atmospheric nitrogen reduction. Nitrogenase has both Iron Protein and Iron-Molybdenum Protein. Magnesium is not directly involved in the nitrogenase complex for nitrogen fixation.
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