First slide

Metabolism of Nitrogen

Question

Root nodules in Alnus are due to association with

Easy

A

Rhizobium
B

Azospirillum
C

Frankia
D

Clostridium

Solution

Frankia produces nitrogen-fixing nodules on the roots of non-leguminous plants, e.g., Alnus. Frankia is free-living in soil, but as symbionts, can fix atmospheric nitrogen.

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