sexr questions 34-38, please choose the best answer from the following list. Ans
ID: 3519597 • Letter: S
Question
sexr questions 34-38, please choose the best answer from the following list. Answers may be used once, more than or not at all. Each question has only one best answer a. Heterotrimerke G proteins .Recptos with ntrinsi eitymatic esiviy d. e. Tyrosine kinase linked receptors voC 34. Open or close in response to changes in RMP 35. Dimerization 36. Intracellular ligands 37. Autophosphorylation 38. Involve all 5 components of signal transduction pathways 39. NOT involved in shutting down a heterotrimeric Galpha () a. b. c. d. e. Natural degredation of ligand Reassociation of regulatory and catalytic subunits of PKC Receptor mediated endocytosis RGS proteins Spontaneous hydrolysis of GTP 40. During signal transduction in a GalphaS receptor, what event immediately follows binding of ligand and receptor? a. b. c. d. e. activation of adeny late cyclase activation of PKA binding of GTP to the GalphaS subunit dissociation of GDP from the GalphaS subunit production of cAMP from ATP 41. DIRECTLY precedes activation of CAM kinases for certain heterotrimeric G proteins a. Activation of calmodulin b. Activation of PLC c. Activation of PIP2 d. Autophosphorylation e. IP3 binding to the ER 42. Cat+ is NOT involved in which of the following? a. b. c. d. e. Activation of cam kinases Activation of PKC Exocitotoxicity Formation of arachidonic acid metabolites None of the above 43. A given ligand binds to both Galpha(s) and Galpha() receptors. B inding to Galpha() causes vasodilation. What would binding to Galpha(i) likely cause? a. Activation of PKA b. Activation of PKC c. Bronchodilation d. Increased heart rate e. Vasoconstriction Proposed mechanism by which RGS proteins turn off signal transduction elimination of Ca*+ from the cytosol prevents activation of PLA2 promotes promotes hydrolysis GTP 44. a. b. c. d. es dissociation of cAMP from regulatory subunits of PKCExplanation / Answer
Answers
34 - VOC (voltage operated channels)
The changes in the resting membrane potential is related opening and closing voltage operated channels.
35 - receptors with intrinsic enzyme activity
The dimerization occurs in receptor with intrinsic enzyme activity when ligand binds to it.
36 - Heterotrimeric G proteins
37. Tyrosine kinase linked receptor
These undergoes autophosphorylation.
38. Heterotrimeric G proteins.
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