#Question id: 15867
#SCPH05 I Biotechnology
#Question id: 7754
#I Life Science/ Life Sciences Group – I-V
#Question id: 1708
#I Life Science/ Life Sciences Group – I-V
When antigen reaches a lymph node in a primed animal:
#Question id: 1604
#SCPH05 I Biotechnology
Many viruses produce a protein immunoevasin that interferes with antigen presentation by MHC class I molecules. The immunoevasin interfere MHC presentation by
#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?