AIIMS2014Zoology-Plant Physiology
AIIMS 2014 Zoology Plant Physiology MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Leghaemoglobin helps in
A
nitrogen-fixation
B
protecting nitrogenase from O2
C
destroy bacteria
D
transport of food in plants
Correct Answer
Option A
Detailed Explanation
Leghaemoglobin is a protein found in the root nodules of leguminous plants, where it plays a crucial role in nitrogen-fixation by binding to oxygen. This binding protects the nitrogenase enzyme, which is essential for converting atmospheric nitrogen into a usable form for plants, from being inhibited by oxygen. Thus, leghaemoglobin ensures that nitrogen-fixing bacteria can function efficiently in the presence of oxygen.
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