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TLS Online TPP Program

#Question id: 4544

How is the binding of ligand to the extracellular domain communicated to the intracellular domain?

#Unit 3. Fundamental Processes

  1. This can be through an allosteric change in the receptor, whereby binding of ligand alters the shape (and thus activity) of the intracellular domain.

  2. The ligand can act simply to bring together two or more receptor chains, allowing interactions between the intracellular domains of those receptors to activate each other.

  3. Only A

  4. A and B both

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TLS Online TPP Program

#Question id: 2153

#Unit 2. Cellular Organization

Membrane phospholipids include

a. cholesterol.            

b. plasmologens.        

c. sphingolipids.         

d. triglycerides.                      

e. bile acids.
TLS Online TPP Program

#Question id: 7103

#Unit 5. Developmental Biology

Patterning of the Xenopus mesoderm along the dorso-ventral axis involves an antagonistic relationship between chordin and BMP-4. Is there an analogy here to dorso-ventral patterning in the Drosophila embryo?
TLS Online TPP Program

#Question id: 32327

#Unit 1. Molecules and their Interaction Relevant to Biology

If these 2 reactions are happening together the what will the overall free energy of the 

 
TLS Online TPP Program

#Question id: 11161

#Unit 9. Diversity of Life Forms

The lakes of northern Minnesota are home to many similar species of damselflies of the genus Enallagma that have apparently undergone speciation from ancestral stock since the last glacial retreat about 10,000 years ago. Sequencing which of the following would probably be most useful in sorting out evolutionary relationships among these closely related species?
TLS Online TPP Program

#Question id: 7134

#Unit 5. Developmental Biology

What important lesson for the mechanisms of development can we derive from the ability to clone frogs by nuclear transfer?