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TLS Online TPP Program

#Question id: 1244

Which type of experimental evidence shows that the intrinsic GTPase activity of the Gα subunit is important for terminating effector activation?

#Unit 4. Cell Communication and Cell Signaling

  1. A nonhydrolyzable GTP analog that can bind to the Gα subunit but cannot be hydrolyzed by the intrinsic GTPase, thereby activating the effector protein longer upon ligand-induced activation of the receptor. 

  2. A nonhydrolyzable GTP analog causes displacement of GDP with the modified GTP resulting in continuous activation of the receptor because the bound GTP analog cannot be hydrolyzed to GDP.

  3. A dominant active (constant activity) GEF causes stimulation of the effector protein for longer upon ligand-induced activation of the receptor.

  4. A dominant negative (no activity) GEF causes stimulation of the effector protein for longer upon ligand-induced activation of the receptor.

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TLS Online TPP Program

#Question id: 5530

#Unit 5. Developmental Biology

 The cavity inside the blastula is called the
TLS Online TPP Program

#Question id: 23403

#General Aptitude

A deaf is always dumb because
TLS Online TPP Program

#Question id: 908

#Unit 1. Molecules and their Interaction Relevant to Biology

Molecular chaperones are a class of proteins that play a role
TLS Online TPP Program

#Question id: 5032

#Unit 11. Evolution and Behavior

There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?
TLS Online TPP Program

#Question id: 11452

#Unit 7. System Physiology – Animal

A given photon of light may trigger an action potential with thousands of times more energy because the signal strength is amplified by ________.