Class 11

Mineral Nutrition question bank (Biology)

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Q1.

$A$: Chelating agents used in improving the availability of some minerals in soil are actually electron acceptors.
$R$: They increase the solubility of some minerals in acidic soils.

(A)
Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
(B)
Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
(C)
Assertion is correct,but Reason is incorrect.
(D)
Both Assertion and Reason are incorrect.
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Q2.

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)
Cannot fix nitrogen in the free-living state
(C)
Cannot fix specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
(D)
Like $Rhizobium$,it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host's cortex
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