Which of the following protein is found in the nodulated roots inhabited by Rhizobium?

Leg haemoglobin

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Plstocyanin

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Nitrate reductase

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Hydrogenase

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Solution

The correct option is B Leg haemoglobin
Root nodules of leguminous plants harbor Rhizobium bacteria. These bacteria convert atmospheric nitrogen into ammonium ions with the help of nitrogenase enzyme. The nitrogenase enzyme is sensitive to oxygen. Hence, these bacteria produce leghemoglobin pigment, which acts as scavenger of oxygen and binds free oxygen. Thus, protecting the bacterial nitrogenase.

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