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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: 5093

#XL - T Zoology

Which of the following is a result of gastrulation in animals?

I) The archenteron is formed.

II) The body axes are established.

III) The germ layers are formed.
TLS Online TPP Program

#Question id: 2124

#XL - T Zoology

An integral membrane protein can be extracted with:
TLS Online TPP Program

#Question id: 5543

#XL - T Zoology

What is the purpose of the chorion in terrestrial vertebrate embryos?
TLS Online TPP Program

#Question id: 18391

#XL - S Microbiology

Detoxification of organophosphate pesticides in the environment is performed by
TLS Online TPP Program

#Question id: 9587

#XL - Q Biochemistry

The structure of the four major protein complexes in the thylakoid membrane are organised form such as ;

a.) PSII is located predominantly in the stacked regions of the thylakoid membrane and Cytochrome b6f complexes are evenly distributed

b.) PSI and ATP synthase are found in the unstacked regions protruding into the stroma

c.) Lateral separation of the two photosystems requires that electrons and protons produced by PSII be transported directly to PSI and the ATP coupling enzyme

d.) Four main protein complexes of the thylakoid membrane, shown also are the two diffusible electron carriers—plastocyanin, which is located in the thylakoid lumen, and plastohydroquinone (PQH2) in the membrane, The lumen has a positive electrical charge with respect to the stroma

Which of the following statements correct?