Question
During biological nitrogen fixation inactivation of nitrogenase by oxygen poisoning is prevented by
-
Leghaemogolobin
-
Xanthophyll
-
Carotene
-
Cytochrome
Solution
A.
Leghaemogolobin
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisioning is prevented by leghaemoglobin.
It is a red-pigment that is filled outside the peribacteroid space in the cytosol of nodule cells. It has the ability to combine very rapidly with oxygen and thus acts a very efficient O2 scavenger.
