#Question id: 8850
#Unit 9. Diversity of Life Forms
Whatever its ultimate cause(s), the Cambrian explosion is a prime example of
#Question id: 3892
#Unit 3. Fundamental Processes
The DNA binding motif for many prokaryotic regulatory proteins, such as the lac repressor, is:
#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?
#Question id: 26349
#Unit 2. Cellular Organization
which of the following is compaction associated DNA sequences which are generally located between H1 and H3 binding sites
#Question id: 22941
#Unit 5. Developmental Biology