TLS Online TPP Program

#Question id: 10534


This experiment (shown in figure ) was performed at 37degree C. If the experiment were carried out at 10 degree C, what effect would you expect on the rate of diffusion? Why?


#Unit 2. Cellular Organization
  1. Increase. Movement of individual lipids in bilayers occurs much faster at 37 degree C, when the lipids are in the “fluid” phase, than at 10 degree C, when they are in the “solid” phase.

  2. Decrease. Movement of individual lipids in bilayers occurs much slower at 37 degree C, when the lipids are in the “fluid” phase, than at 10 degree C, when they are in the “solid” phase.

  3. Increase. Movement of individual lipids in bilayers occurs much slower at 37 degree C, when the lipids are in the “fluid” phase, than at 10 degree C, when they are in the “solid” phase.

  4. Decrease. Movement of individual lipids in bilayers occurs much faster at 37 degree C, when the lipids are in the “fluid” phase, than at 10 degree C, when they are in the “solid” phase.

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TLS Online TPP Program

#Question id: 741

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of following statements are INCORRECT about secondary structure of proteins

A. Long block of Glu residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation below its pKR value

B. Long block of Lys residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation above its pKR value

C. Long block of Ala residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation below its pKR value

D. Histidine side chain remain uncharged over pH range 3-6

TLS Online TPP Program

#Question id: 740

#Unit 1. Molecules and their Interaction Relevant to Biology

The conformation of the backbone of a polypeptide is described completely by the angle(s) of rotation about which bond(s)?

TLS Online TPP Program

#Question id: 739

#Unit 1. Molecules and their Interaction Relevant to Biology

What is true about the rotation about bonds in a protein backbone?

TLS Online TPP Program

#Question id: 738

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct for peptide bonds

A) C and N are shorter than typical C-N bonds.

B) C and N are longer than typical C-N bonds.

C) C and O are longer than typical C=O bonds.

D) C and O are shorter than typical C=O bonds.

TLS Online TPP Program

#Question id: 737

#Unit 1. Molecules and their Interaction Relevant to Biology

Which structure below indicates the proper hydrogen-bonding pattern between amino acids in an α-helix? (Dashed lines represent the hydrogen bonds.)

TLS Online TPP Program

#Question id: 736

#Unit 1. Molecules and their Interaction Relevant to Biology

The most important contribution to the stability of a protein’s conformation appears to be the: