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TLS Online TPP Program

#Question id: 16957

the immune system can be summarized as follows. Which is not correct for immune system?

#Unit 4. Cell Communication and Cell Signaling
  1. A cell can become more or less susceptible to the actions of a ligand by increasing (up-regulating) or decreasing (down[1]regulating) the expression of the receptor for that li
  2. Ligand binding to the receptor induces a molecular change in the receptor. This change may be in the form of a conformational alteration in the receptor, receptor dimerization or clustering, a change in the receptor’s location in the membrane, or a covalent modification.
  3. a cell must not receive more than one signal through more than one receptor in order to effect a particular outcome.
  4. Integration of all the signals received by a cell occurs at the molecular level inside the recipient cell.
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TLS Online TPP Program

#Question id: 23753

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following is always with 'Bargain'?
TLS Online TPP Program

#Question id: 23752

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following is always associated with a 'tree'?
TLS Online TPP Program

#Question id: 23751

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following is always associated with 'Justice'?
TLS Online TPP Program

#Question id: 743

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycophorin, an integral membrane protein, has a single transmembrane alpha helix. Which of the following idealized hydropathy plots most likely represents the transmembrane nature of glycophorin?
TLS Online TPP Program

#Question id: 742

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following

Conformation

Phi

Psi

Omega

A. Alpha helix

I. -57

P. -47

X. 180

B. B sheet

II. -135

Q. +135

Y. 0

C. Polyproline I

III. -83

R. +158

D. Polyproline II

IV. -78

S. +149

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