Which one of the following can utilize molecular nitrogen $(N_{2})$ as nutrient for growth?

Rhizobium

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Spirogyra

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Mucor

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Methancoccus

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Solution

The correct option is A Rhizobium
Rhizobium is rod shaped bacterium, which can directly use atmospheric nitrogen and reduce it to organic nitrogen with the help of enzyme nitrogenase. The reducing equivalents required for reducing nitrogen into ammonia are obtained from the host plant, where Rhizobium forms nodules.

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Similar questions

(N_{2})

N_{2}^{+}

Assertion (A): Higher plants can not utilize nitrogen that is present in the form of $N_{2}$ in air.

Reason (R): In higher plants, the nitrogenase enzyme is absent.

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