During `N_(2)` fixation, reduction of one molecule of nitrogen into 2 molecules of `NH_(3)` consumes _____molecules of ATP.

Options

A. 4
B. 16
C. 56
D. 38

Answer

B

Explanation

The chemical equation of nitrogen fixation can be summarised as:
`N_(2)+8e^(-)+8H^(+)+16ATPoverset("dinitrogenase")to2NH_(3)+H_(2)+16ADP+16P i`
ATPs are provided by photosynthesis and respiration.