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TLS Online TPP Program

#Question id: 24281

Which of the following statement describes inside-out signaling?

#Unit 4. Cell Communication and Cell Signaling
  1. Binding of integrins to their ligands induces conformational changes in their cytoplasmic domains, directly or indirectly altering their interactions with cytoplasmic proteins
  2. Binding of integrins to their ligands induces conformational changes in their transmembrane domains, directly or indirectly altering their interactions with cytoplasmic proteins
  3. Binding of cytoskeletal proteins intracellularly induces conformational changes in extracellular domains of integrins, so it unable to bind to the ligands
  4. intracellular signaling pathways can, via adapter proteins, modify the ability of integrins to bind to their extracellular ligands
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TLS Online TPP Program

#Question id: 27402

#Unit 1. Molecules and their Interaction Relevant to Biology

In which of the following lipid two phosphatidic acids share a single glycerol (R1 and R2 are fatty acyl groups).
TLS Online TPP Program

#Question id: 27403

#Unit 1. Molecules and their Interaction Relevant to Biology

Precursor for the sphingosine is
TLS Online TPP Program

#Question id: 27404

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement is correct regarding the Structural Lipids in Membranes

1.It acts as a barrier to the passage of polar molecules and ions

2.Membrane lipids are amphipathic: one end of the molecule is hydrophobic, the other hydrophilic

3.Membrane bilayers are formed only by the hydrophobic interaction only 

4.Both hydrophobic and hydrophilic interactions are responsible for membrane bilayer formation
TLS Online TPP Program

#Question id: 27405

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the following structural features of lipids are given which of the following is incorrect 
TLS Online TPP Program

#Question id: 27406

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following enzymes that catalyze the hydrolysis of stored triacylglycerols, releasing fatty acids for export to sites where they are required as fuel
TLS Online TPP Program

#Question id: 27407

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following  reason is most accurately satisfying that archaebacteria can live in harsh environment