#Question id: 5749
#SCPH06 I Botany
#Question id: 98
#SCPH05 I Biotechnology
The elasticity and resistance to compression of connective tissue is due to
#Question id: 4160
#SCPH05 I Biotechnology
Different tRNA molecules that bind the same amino acid are called __ tRNA molecules.
#Question id: 2667
#SCPH06 I Botany
A regulatory protein that attracts RNA polymerase to its promoter is an example of what type of regulation?
#Question id: 10342
#I Life Science/ Life Sciences Group – I-V
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?