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TLS Online TPP Program

#Question id: 11126

Which of the following is characteristic of the events occurring at an excitatory synapse?

#Unit 7. System Physiology – Animal
  1. There is a massive efflux of calcium from the presynaptic terminal
  2. Synaptic vesicles bind to the postsynaptic membrane
  3. Voltage-gated potassium channels are closed
  4. Ligand-gated channels are opened to allow sodium entry into the postsynaptic neuron
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TLS Online TPP Program

#Question id: 10387

#Unit 6. System Physiology – Plant

Action spectrum stimulated phototropism in oat coleoptiles. The “three finger” pattern in the 400–500 nm region is characteristic of-
TLS Online TPP Program

#Question id: 2502

#Unit 2. Cellular Organization

The important role that intermediate filaments play in the epithelial cells of the skin is evident in which of the following?
TLS Online TPP Program

#Question id: 1055

#Unit 4. Cell Communication and Cell Signaling

What part of the E. coli T4 phage attaches to the host cell receptors?
TLS Online TPP Program

#Question id: 2443

#Unit 2. Cellular Organization

Microtubule-associated proteins

a. typically co-localize with microtubules inside cells.

b. are divided into two types: those that stabilize microtubules and those that destabilize microtubules.

c. typically co-purify with microtubules.                  

d. are similar to α- and β-tubulin.
TLS Online TPP Program

#Question id: 32262

#Unit 2. Cellular Organization

What is the consequence of introducing charged amino acids into the hydrophobic core of an ER signal sequence?