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Question

Pigment useful for nitrogen fixation is


A
cytochrome
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B
haemoglobin 
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C
myoglobin
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D
leghaemoglobin
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Solution

The correct option is B leghaemoglobin
Many plants which fix nitrogen have root nodules that provide a home for symbiotic nitrogen-fixing bacteria called rhizobia. Leghemoglobin is a nitrogen or oxygen carrier and hemoprotein found in the nitrogen-fixing root nodules of leguminous plants. 
 

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