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(C) The process of biological nitrogen fixation is catalyzed by the enzyme nitrogenase. The overall equation for the reduction of nitrogen to ammonia

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$8$

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(C) The process of biological nitrogen fixation is catalyzed by the enzyme nitrogenase. The overall equation for the reduction of nitrogen to ammonia is: $N_2 + 8e^- + 8H^+ + 16ATP \rightarrow 2NH_3 + H_2 + 16ADP + 16\Pi$. According to this equation,$16$ $ATP$ molecules are required to produce $2$ molecules of $NH_3$. Therefore,for the production of each $NH_3$ molecule,$16 / 2 = 8$ $ATP$ molecules are required.

How many $ATP$ molecules are required for the production of each $NH_3$ molecule during biological nitrogen fixation?

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