Give two examples where oxygen is not playing any role in supporting life.
(N/A) $(i)$ Some bacteria are poisoned by elemental oxygen.
$(ii)$ The process of nitrogen fixation by bacteria,such as the enzyme nitrogenase,is inhibited by the presence of oxygen.
$(ii)$ The process of nitrogen fixation by bacteria,such as the enzyme nitrogenase,is inhibited by the presence of oxygen.
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