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TLS Online TPP Program

#Question id: 27173

The following statements are made with reference to membrane fusion reactions in vesicle transport catalyzed by transmembrane SNARE proteins.


#XL - T Zoology

  1. The SNARE transmembrane proteins exist as complementary sets, with v-SNARES on vesicle membranes and t-SNARES on target membranes

  2. A v-SNARE is usually composed of 3 proteins and t-SNARE is a single polypeptide chain
  3. The v-SNARE and t-SNARE proteins of a pair interact via helical domains possessed by the two proteins, resulting in formation of a stable two-helix bundle
  4. Membrane fusion is catalysed by the energy that is freed when the interacting helices wrap around each other to pull the membrane faces together, concurrently squeezing out water molecules from the interface.
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TLS Online TPP Program

#Question id: 1738

#XL - Q Biochemistry

T-cell help for antibody production:
TLS Online TPP Program

#Question id: 1739

#XL - Q Biochemistry

Cross-linking of B-cell surface receptors:
TLS Online TPP Program

#Question id: 1740

#XL - Q Biochemistry

Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between:
TLS Online TPP Program

#Question id: 1741

#XL - Q Biochemistry

B-cells as distinct from T-cells:
TLS Online TPP Program

#Question id: 1742

#XL - Q Biochemistry

The T-cell receptor link to MHC–peptide is enhanced by interaction between MHC class II on the antigen-presenting cells with the following molecule on the T-cell:
TLS Online TPP Program

#Question id: 1743

#XL - Q Biochemistry

The main costimulatory signal for activation of resting T-cells is provided by ligation of: