試題詳解

13. Which of the following statements about the fixation of atmospheric nitrogen (N₂) into NH3 by living cells is false?
(A) It involves the transfer of 8 electrons per mol of N₂.
(B) It occurs in certain microorganisms, but not in humans.
(C) It requires a source of electrons, normally ferredoxin.
(D) It requires one ATP per mol of N₂ fixed.
(E) It requires two key protein components, each containing iron.