Question

The filamentous bacterium which can symbiotically fix $N_2$ in leguminous plants is

• A. Bradyrhizobium
• B. Frankia
• C. Nocardia
• D. Mycobacterium

Answer 1

The correct option is B Frankia

(A) Bradyrhizobium fixes nitrogen in non-leguminous plants.

(B) Frankia fixes nitrogen in leguminous plants.

(C) Nocardia is a pathogenic bacteria responsible for nocardiosis.

(D) Mycobacterium is a pathogenic bacteria responsible for many diseases.

So, the correct option is 'Frankia'.