Engineer & Medical

Mineral Nutrition question bank (Biology)

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Q1.

Which one of the following statements is CORRECT about biological nitrogen fixation in plants?

(A)
Atmospheric nitrogen is fixed by Nitrogenase by converting $\mathrm{N}_2$ to $\mathrm{NO}_3^{-}$.
(B)
The catalytic redox center of Nitrogenase contains Mo and Fe as cofactors.
(C)
The transport of important amides, like asparagine and glutamine, produced by transamination, to different parts of the plant body is mediated by phloem.
(D)
Nitrogenase can function optimally only in the presence of molecular oxygen.
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Q2.

In plants, ammonium ions are produced by protonation of ammonia. Which enzyme uses these ammonium ions to convert an alpha-keto acid into an amino acid?

(A)
Nitrogenase
(B)
Lactate dehydrogenase
(C)
Glutamate dehydrogenase
(D)
Transacetylase
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