Homework Answers
Ion channels.
G protein had 3 subunits. Alpha, beta and gamma. In one way the alpha unit will bind with the effector which activates ion channels. In other way the beta and gamma subunits directly binds to ion channels to open it.
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After activation by a coupled receptor, G-proteins directly regulate which of the following? 1) Ion channels...
The opening of metabotropic G-protein-coupled receptor ion channels is faster than ionotropic transmitter-gated ion channels, triggering...
The opening of metabotropic G-protein-coupled receptor ion channels is faster than ionotropic transmitter-gated ion channels, triggering a wide- spread cellular metabolic effect. True False
3. Think about what G-proteins look like before they bind to a G-protein-coupled receptor. These G-proteins...
3. Think about what G-proteins look like before they bind to a G-protein-coupled receptor. These G-proteins would have...circle your answer GTP attached to them OR GDP attached to them (a) Think about what G-proteins look like after they bind to a G-protein-coupled receptor. These G-proteins would have...circle your answer GTP attached to them OR GDP attached to them (b) A molecule of GTP contains how many phosphate groups? (c) Think about a G-protein that has a GTP attached to it....
Ligand binding to a G-protein coupled receptor (GPCR) results in activation of a single G- protein...
Ligand binding to a G-protein coupled receptor (GPCR) results in activation of a single G- protein and then the receptor deactivates. O True False When an activated receptor relays the signal along more than one pathways this is called convergence. O True OFalse Which of the following best describes digestive enzymes? O Hydrolases OLigases Kinases Transferases Decarboxylases Most digestive enzymes are released from cells in an inactive form. True False denatures Protein digestion in humans (and other mammals) begins in...
A. B. C. D. E. F. Thank you receptors induce activation of adenlyate cyclase, which creates...
A. B. C. D. E. F. Thank you
receptors induce activation of adenlyate cyclase, which creates the second messenger(s) O G-Protein Coupled, CAMP O Tyrosine Kinase, CAMP OTyrosine Kinase, IP3 and DAG G-Protein Coupled, IP3 and DAG Which of the following is most likely to be activated by a small hydrophobic signal? OIntracellular receptor Receptor Tyrosine Kinase O G-Protein Coupled Receptor Ligand-Gated lon Channel Which of the following types of receptors require dimerization for activation? (Select any/all that apply) OLigand-gated...
What is the order in which G-proteins binds to ion channels? Select one: G-protein binds to...
What is the order in which G-proteins binds to ion channels? Select one: G-protein binds to receptor, GTP is added and activates alpha subunit, receptor is activated, the alpha and gamma complex binds to channel, channel opens GTP is added and activates alpha subunit, G-protein binds to receptor, receptor is activated, the beta and gamma complex binds to channel, channel opens. activate receptor, G-protein binds to receptor, GTP is added and activates alpha subunit, the alpha beta and gamma complex...
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins...
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins O proteins with SH2 domains
Which of the following mutations to the G alpha protein could render a G protein–coupled receptor...
Which of the following mutations to the G alpha protein could render a G protein–coupled receptor signaling pathway constitutively active? a G alpha cannot bind G beta/gamma b G alpha cannot hydrolyze GTP c G alpha protein cannot bind GDP d G alpha protein cannot release GDP e G alpha protein cannot bind GTP
G-protein coupled receptors can exhibit which of the following actions? Select one: a. Dimerization b. Tyrosine...
G-protein coupled receptors can exhibit which of the following actions? Select one: a. Dimerization b. Tyrosine kinase activity c. Nuclear Localization d. Activation of Adenylate Cyclase e. ATPase activity
Need help on these questions ? 1.) Steroid hormones trigger transcription of target genes by... ...
Need help on these questions ? 1.) Steroid hormones trigger transcription of target genes by... a. activating the release of Ca+2 ions that bind to and activate transcription factors. b. activating a kinase cascade that results in the activation of a transcription factor for a set of genes. c. binding directly to DNA and stimulating transcription. d. binding to nuclear receptors that act as transcription factors for specific genes. 2.) Which type of cell-surface receptor(s), when...
Which of the following regarding platelet activation in homeostasis and thrombosis is not correct? a. Platelets adhere d...
Which of the following regarding platelet activation in homeostasis and thrombosis is not correct? a. Platelets adhere directly to subendothelial collagen via GPIa-IIa and GPVI, while binding of GPIb-IX-V is mediated via von Willebrand factor. b. The aggregating agent thromboxane A2 is formed from arachindonic acid liberated from platelet membrane phospholipids by the action of phospholipase A2. c. The aggregating agent ADP is released from the dense granules if activated platelets. d. The ADP receptors, the thromboxane A2 receptor, the...
The opening of metabotropic G-protein-coupled receptor ion channels is faster than ionotropic transmitter-gated ion channels, triggering a wide- spread cellular metabolic effect. True False
3. Think about what G-proteins look like before they bind to a G-protein-coupled receptor. These G-proteins would have...circle your answer GTP attached to them OR GDP attached to them (a) Think about what G-proteins look like after they bind to a G-protein-coupled receptor. These G-proteins would have...circle your answer GTP attached to them OR GDP attached to them (b) A molecule of GTP contains how many phosphate groups? (c) Think about a G-protein that has a GTP attached to it....
Ligand binding to a G-protein coupled receptor (GPCR) results in activation of a single G- protein and then the receptor deactivates. O True False When an activated receptor relays the signal along more than one pathways this is called convergence. O True OFalse Which of the following best describes digestive enzymes? O Hydrolases OLigases Kinases Transferases Decarboxylases Most digestive enzymes are released from cells in an inactive form. True False denatures Protein digestion in humans (and other mammals) begins in...
A. B. C. D. E. F. Thank you
receptors induce activation of adenlyate cyclase, which creates the second messenger(s) O G-Protein Coupled, CAMP O Tyrosine Kinase, CAMP OTyrosine Kinase, IP3 and DAG G-Protein Coupled, IP3 and DAG Which of the following is most likely to be activated by a small hydrophobic signal? OIntracellular receptor Receptor Tyrosine Kinase O G-Protein Coupled Receptor Ligand-Gated lon Channel Which of the following types of receptors require dimerization for activation? (Select any/all that apply) OLigand-gated...
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins O proteins with SH2 domains
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