Question

All of the following statements concerning the actinomycetous filamentous soil bacterium Frankia are correct except that Frankia

• A. Can induce root nodules on many plant species
• B. Can fix nitrogen in the free-living state
• C. Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
• D. Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids

Answer 1

The correct option is B Can fix nitrogen in the free-living state

Frankia is a bacterium which grows in a symbiotic association with the roots of non-leguminous plants. It can fix atmospheric nitrogen. It cannot fix nitrogen in free-living state.

So, the correct option is 'Can fix nitrogen in free-living state'.