OBJECTIVE LIFE SCIENCE
PLANT PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by?
|
|
Carotene
|
|
|
Cytochrome
|
|
|
Leghaemoglobin
|
|
|
Xanthophyll
|
Explanation:
Detailed explanation-1: -During biological nitrogen fixation, inactivation of nitrogenase by oxygen posioning is prevented by leghaemoblocin. It is a red-pigment that is filled ouside the peribacteroid space In the cytosol of nodule cells. It is similar to haemoglobin of red blood cells.
Detailed explanation-2: -of the leguminous plants, and nitrogen-fixing bacteria function under anaerobic condition. Hence, leghaemoglobin combines with oxygen and protects the enzyme. It acts as the oxygen scavenger.
Detailed explanation-3: -Leghaemoglobin is an oxygen scavanger. It combines with oxygen and protects nitrogenase, which catalyses the fixation of nitrogen under anaerobic conditions.
There is 1 question to complete.