TLS Online TPP Program

#Question id: 3876


Which one of the following is not true of the mRNA for ovalbumin?

#SCPH01 Biochemistry
  1. Exons are used for polypeptide synthesis.

  2. Introns are complementary to their adjacent exons and will form hybrids with them.

  3. The mature mRNA is substantially shorter than the corresponding region on the DNA.

  4. The mRNA is originally synthesized in the nucleus, but ends up in the cytoplasm.

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TLS Online TPP Program

#Question id: 1118

#SCPH01 Biochemistry

What are scaffolding proteins?

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: 933

#SCPH05 I Biotechnology

Industrially, nitrogen for use in fertilizers is converted to ammonia by ________.

TLS Online TPP Program

#Question id: 390

#SCPH05 I Biotechnology

What are the properties arising due to varying concentrations of solute in a given solvent, irrespective of the nature of solute with respect to the solvent?

TLS Online TPP Program

#Question id: 14803

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

The percentage SIMILARITIES and IDENTITIES, respectively, between the two peptide sequences given below will be ______% and _____%.

Peptide I :
Ala-Ala-Arg-Arg-Gln-Trp-Leu-Thr-Phe-Thr-Lys-Ile-Met-Ser-Glu

Peptide II:
Ala-Ala-Arg-Glu-Gln-Tyr-Ile-Ser-Phe-Thr-Lys-Ile-Met-Arg-Asp