Q. Which of the following elements play important role in Biological Nitrogen Fixation? Iron  Molybdenum  Magnesium  Select the correct option from the codes given below:
Answer: Only 1 & 2
Notes: Only Iron and Molybdenum play important role in BNF. The enzyme used is called nitrogenase. The nitrogenase enzyme has two kinds of proteins viz. Iron Protein, and Iron-Molybdenum protein.

3

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