NEET Biology question

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

(A)Can induce root nodules on many plant species
(B)Cannot fix nitrogen in the free-living stateCorrect
(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: (B)

Solution

*Frankia* is well known to induce root nodules on a wide range of non-leguminous host plants (a, true), to infect its host through root hair deformation and stimulate cortical cell proliferation much like *Rhizobium* (c, true), and to protect its oxygen-sensitive nitrogenase inside specialized vesicles using a

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Question ID VK-087732