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Questions
1
IAT (IISER) 2023
MCQ (Single Correct Answer)
+4
-1
Which one of these 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
Nitrogenase can function optimally only in the presence of molecular oxygen.
D
The transport of important amides, like asparagine and glutamine, produced by transamination, to different parts of the plant body is mediated by phloem.
2
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
Which of the following processes increases the uptake of water and minerals by roots in legumes?
A
Active uptake by xylem
B
Pumping through plasmodesmata
C
Pumping through cortical cells
D
Formation of mycorrhizae
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