In eukaryotes, which of the following modifications is made to a primary transcript prior to its transport out of the nucleus?

#Question id: 3664

#SCPH05 I Biotechnology

 If a mutation is complemented by a clone of a different gene whose product is being overproduced, this is called:

#Question id: 10342

#SCPH06 I Botany

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: 2072

#I Life Science/ Life Sciences Group – I-V

Which of the following structures would decrease the electrochemical gradient across a membrane?

#Question id: 19623

#SCPH05 I Biotechnology

#Question id: 387

#SCPH05 I Biotechnology

For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.