1.) The ion channel that opens in response to acetylcholine is an example of a _
ID: 10585 • Letter: 1
Question
1.) The ion channel that opens in response to acetylcholine is an example of a ____________ signal transduction system.A) G protein
B) ligand-gated
C) receptor-enzyme
D) serpentine receptor
E) voltage-gated
2.) In the plant signaling pathways employing receptor-like kinases (RLKs), which one of the following
does not occur?
A) Activation of a MAPK cascade
B) Autophosphorylation of receptor
C) Dimerization of receptor
D) Ligand binding to receptor
E) Phosphorylation of key proteins on Tyr residues
3.) Most transduction systems for hormones and sensory stimuli that involve trimeric G proteins have in
common all of the following except:
A) cyclic nucleotides.
B) nuclear receptors.
C) receptors that interact with a G protein.
D) receptors with multiple transmembrane segments.
E) self-inactivation.
4.)Which of the following statements concerning cyclin-dependent protein kinases is not correct?
A) Each type of cell contains one specific form (isozyme).
B) Their activity fluctuates during the cell cycle.
C) Their activity is regulated by changes in gene expression, protein phosphorylation, and proteolysis.
D) Their activity is regulated by cyclins.
E) They can alter the activity of proteins involved in the progression of cells through the cell cycle.
Explanation / Answer
1.) The ion channel that opens in response to acetylcholine is an example of a ____________ signal transduction system.
A) G protein
B) ligand-gated
C) receptor-enzyme
D) serpentine receptor
E) voltage-gated
2.) In the plant signaling pathways employing receptor-like kinases (RLKs), which one of the following
does not occur?
A) Activation of a MAPK cascade
B) Autophosphorylation of receptor
C) Dimerization of receptor
D) Ligand binding to receptor
E) Phosphorylation of key proteins on Tyr residues
3.) Most transduction systems for hormones and sensory stimuli that involve trimeric G proteins have in
common all of the following except:
A) cyclic nucleotides.
B) nuclear receptors.
C) receptors that interact with a G protein.
D) receptors with multiple transmembrane segments.
E) self-inactivation.
4.)Which of the following statements concerning cyclin-dependent protein kinases is not correct?
A) Each type of cell contains one specific form (isozyme).
B) Their activity fluctuates during the cell cycle.
C) Their activity is regulated by changes in gene expression, protein phosphorylation, and proteolysis.
D) Their activity is regulated by cyclins.
E) They can alter the activity of proteins involved in the progression of cells through the cell cycle.
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