Consider the following:
Which among the above play important role in Biological Nitrogen Fixation?
Iron and Molybdenum play important role in BNF; this is well established. The enzyme used is called nitrogenase. The nitrogenase enzyme has two kinds of proteins viz. Iron Protein, and Iron-Molybdenum protein. Some studies have confirmed role of Mg++ also.
This question is a part of GKToday's Integrated IAS General Studies Module