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TLS Online TPP Program

#Question id: 1127

Which of the following steps does not occur after acetylcholine binds to the muscarinic acetylcholine receptor in heart muscle cells?

#Unit 4. Cell Communication and Cell Signaling

  1. dissociation of Giα subunit from the Gβγ complex

  2. binding of the released Giα subunit to K+ channels

  3. hydrolysis of GTP to GDP by Giα                       

  4. opening of K+ channels

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TLS Online TPP Program

#Question id: 1645

#Unit 4. Cell Communication and Cell Signaling

What is the characteristic that best defines the acquired immune response?
TLS Online TPP Program

#Question id: 1646

#Unit 4. Cell Communication and Cell Signaling

The basic immunoglobulin (Ig) unit is composed of:
TLS Online TPP Program

#Question id: 1647

#Unit 4. Cell Communication and Cell Signaling

A fragment antigen binding (Fab) fragment:
TLS Online TPP Program

#Question id: 1648

#Unit 4. Cell Communication and Cell Signaling

The complementarity determining regions (CDRs):
TLS Online TPP Program

#Question id: 1649

#Unit 4. Cell Communication and Cell Signaling

Which of the following gene clusters do NOT contribute to antigen binding?
TLS Online TPP Program

#Question id: 1650

#Unit 4. Cell Communication and Cell Signaling

Recombination of V, D, and J Ig gene segments: