When a diploid organism undergoes one or more rounds of endoreduplication (resulting in a gain of more than one complete haploid set of chromosomes), the resulting cells are best described as

#Question id: 14770

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

#Question id: 364

#SCPH01 Biochemistry

 A solution contains 0.0000001 (10-7) moles of hydrogen ions [H+] per liter. Which of the following best describes this solution?

#Question id: 2608

#SCPH28 | Zoology

Which amino acid is involved in last step;

#Question id: 5446

#SCPH06 I Botany

In a plant, height is control by three quantitative trait loci.  Each dominant additive allele is contributing 5 cm height in plant. Maximum expected plant height is 50 cm. What is minimum expected height? 

#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?