#Question id: 10337
#Unit 6. System Physiology – Plant
In biological nitrogen fixation, the process of nitrification by organism respective bacteria A--which convert the ammonia to nitrite and B--- further converted into nitrate in the soil by their respective A and B bacteria known as;
#Question id: 10338
#Unit 6. System Physiology – Plant
Nitrate from the soil solution actively absorb by Plant roots via several low- and high-affinity transporters known as
#Question id: 10339
#Unit 6. System Physiology – Plant
Nitrate assimilates into the root where the conversion of nitrate to nitrite in the cytosol, a reduction reaction that involves the transfer of two electrons catalyzes by an enzyme that is NAD(P)H dependent is known as
#Question id: 10340
#Unit 6. System Physiology – Plant
There several charecteristics of nitrate reductase, which of the following properties of nitrate reductase is incorrect?
#Question id: 10341
#Unit 6. System Physiology – Plant
The accumulation of nitrate that results from diminished nitrate reductase activity, this symptoms is caused by
#Question id: 10342
#Unit 6. System Physiology – Plant
Nitrate reductase is an important enzyme for nitrate assimilation. Given below some regulation of nitrate reductase activity through phosphorylation and dephosphorylation.
a) Light, and other environmental factors stimulate a protein phosphatase that dephosphorylates a key serine residue in the hinge 1 region of nitrate reductase and thereby activates the enzyme
b) In Dark, and Mg2+ stimulate a protein kinase that phosphorylates the same serine residues, which then interact with a 14-3-3 inhibitor protein, and thereby inactivate nitrate reductase
c) In Light, and Mg2+ stimulate a protein kinase that phosphorylates the serine residues, and thereby activate nitrate reductase
d) In Dark, and other environmental factors stimulate a protein phosphatase that dephosphorylates a key serine residue in the hinge 1 region of nitrate reductase and thereby inactivates the enzyme
Which of the following statements about regulation of nitrate reductase is correct?