In the Nitrogen Fixation Process, Which Step of the Electron

Multiple Choice

In the nitrogen fixation process, which step of the electron transfer process requires ATP hydrolysis?

A) transfer of electron from ferredoxin to the 4Fe-4S complex
B) transfer of electron from 4Fe-4S complex to the P cluster
C) transfer of electron from P cluster to iron-molybdenum cofactor (FeMo-co)
D) transfer of electron from FeMo-co to nitrogen
E) none of the above