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NEET 2022, Biology Q28: Biofertilisers and Biocontrol Agents

NEET2022Biology
Q.

Which one of the following produces nitrogen fixing nodules on the roots of Alnus ?

  1. A

    Rhizobium

  2. B

    Frankia

  3. C

    Rhodospirillum

  4. D

    Beijernickia

Solution

Frankia is an actinomycete that forms symbiotic, nitrogen-fixing nodules on the roots of certain non-leguminous plants, including Alnus (alder), Casuarina, and others.

Rhizobium nodulates legumes, whereas Rhodospirillum and Beijerinckia are free-living nitrogen fixers.

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