During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
(a) Leghaemoglobin
(b) Xanthophyll
(c) Carotene
(d) Cytochrome
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Correct option (a) Leghaemoglobin
Explanation :
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 is similar to haemoglobin of red blood cells. It has the ability to combine very rapidly with oxygen and thus acts as a very efficient O2 scavenger.
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