1215350
Question 1
Question
Which of the following doesn't exist?
Answer
-
Phospholipase C gama
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Protein kinase B
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Protein kinase A
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Phospholipase C alfa
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phospoholipase C beta
Question 2
Question
Inositol trisphosphate-gated calcium channels are located in...
Answer
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regulated exocytotic vesicles
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the plasma membrane
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the inner mitochondrial membrane
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the smooth endoplasmic reticulum
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all of the above
Question 3
Question
Which of the following statements is false?
Answer
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appearance of PIP3 at the plasma membrane can activate a protein kinase
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hydrolysis of GTP by Ras can activate a protein kinase
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an increase of cytosolic cAMP concentration can activate a protein kinase
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dimerization of growth factor receptors can activate a protein kinase
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an increase of cytosolic calcium concentratiojn can activate a protein kinase
Question 4
Question
Which of the following is an enzyme, one of whose substrates is a nucleotide triphosphate?
Answer
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Ras
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The PDGF receptor
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Protein kinase A
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The insulin receptor
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All of the above
Question 5
Question
Phosphotidylinositol bisphosphate is used in two different signaling pathways. these convert it, respectively into:
Answer
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cAMP and c GMP
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IP3 and PIP3
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PIP2 and c AMP
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IP3 and cAMP
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PIP2 and PIP3
Question 6
Question
Arrival of a scent chemical at a scent-sensitive nerve cell causes that cell to
Answer
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generate action poencials
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open voltage-gated sodium channels in the plasma membrane
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open cAMP-gated channels in the plasma membrane
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activae adenylate cyclase
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all of these above
Question 7
Question
Depolarization of axon terminals causes calcium ions to flow into the cytosol through
Answer
-
calcium ATPases
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voltage - gated calcium channels
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cAMP-gated calcium channels
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inositol trisphosphate-gated calcium channels
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ryanodine receptors
Question 8
Question
Why majority of transmitters are released from cells by exocytosis?
Answer
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because different set of receptors activates Gs
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Tyrosine kinases are Grb2 receptors
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Because exocytosis is induced by an increase of cytosolic calcium concentration
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