TLS Online TPP Program

#Question id: 2125


The shortest alpha helix segment in a protein that will span a membrane bilayer has about _____ amino acid residues.

#SCPH06 I Botany
  1. 5

  2. 20

  3. 50

  4. 100

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TLS Online TPP Program

#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?

TLS Online TPP Program

#Question id: 10343

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

In many plants, nitrate is assimilated in the root as well as in the shoot according to their native place. Some of the given statements about nitrate assimilation;

a) If plants native to temperate region assimilate NO3- at root

b) If plants native to temperate region assimilate NO3- at shoot

c) Plants native to tropical or subtropical region assimilate NO3- at root

d) Plants native to tropical or subtropical region assimilate NO3- at shoot

Which of the following combination from above statements is correct?

TLS Online TPP Program

#Question id: 10343

#SCPH05 I Biotechnology

In many plants, nitrate is assimilated in the root as well as in the shoot according to their native place. Some of the given statements about nitrate assimilation;

a) If plants native to temperate region assimilate NO3- at root

b) If plants native to temperate region assimilate NO3- at shoot

c) Plants native to tropical or subtropical region assimilate NO3- at root

d) Plants native to tropical or subtropical region assimilate NO3- at shoot

Which of the following combination from above statements is correct?

TLS Online TPP Program

#Question id: 10343

#SCPH06 I Botany

In many plants, nitrate is assimilated in the root as well as in the shoot according to their native place. Some of the given statements about nitrate assimilation;

a) If plants native to temperate region assimilate NO3- at root

b) If plants native to temperate region assimilate NO3- at shoot

c) Plants native to tropical or subtropical region assimilate NO3- at root

d) Plants native to tropical or subtropical region assimilate NO3- at shoot

Which of the following combination from above statements is correct?

TLS Online TPP Program

#Question id: 10344

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

Some of the following caracteristics of Nitrite reductase, which one of the is incorrect?

TLS Online TPP Program

#Question id: 10344

#SCPH05 I Biotechnology

Some of the following caracteristics of Nitrite reductase, which one of the is incorrect?