7. The following happens when a G-protein-coupled receptor activates a G protein? A. The B subunit exchanges its bound GDP for GTP. B. The GDP bound to the a subunit is phosphorylated to form bound GTP. C. The a subunit exchanges its bound GDP for GTP. D. It activates the a subunit and inactivates the By complex. 8. Which of the following statements is true? A. MAP kinase is important for phosphorylating MAP kinase kinase. B. PI 3-kinase phosphorylates a lipid in the plasma membrane C. Ras becomes activated when an RTK phosphorylates its bound GDP to create GTP D. STAT proteins phosphorylate JAK proteins, which then enter the nucleus and activate gene transcription 9. A cell can crawl through a tissue because of the proteins that can transmembrane bind to fibronectin outside of the cell. A. Integrin B. Collagen C. Gap junction D. Claudin

7. The following happens when a G-protein-coupled receptor activates a G protein? A. The B subunit exchanges its bound GDP for GTP. B. The GDP bound to the a subunit is phosphorylated to form bound GTP. C. The a subunit exchanges its bound GDP for GTP. D. It activates the a subunit and inactivates the By complex. 8. Which of the following statements is true? A. MAP kinase is important for phosphorylating MAP kinase kinase. B. PI 3-kinase phosphorylates a lipid in the plasma membrane C. Ras becomes activated when an RTK phosphorylates its bound GDP to create GTP D. STAT proteins phosphorylate JAK proteins, which then enter the nucleus and activate gene transcription 9. A cell can crawl through a tissue because of the proteins that can transmembrane bind to fibronectin outside of the cell. A. Integrin B. Collagen C. Gap junction D. Claudin

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter9: Cell Communication

Section: Chapter Questions

Problem 6TYK: Which of the following is incorrect about pathways activated by G-proteincoupled receptors? a. The...

See similar textbooks

Similar questions

1. What two things can happen when Protein Kinase A is activated? 2. How does this signal transduction end? 3. What molecule is released by the cell in response to ligand binding? 4. What is the response of glycogen phosphorylation when activated? 5. What happens when glucagon binds to its receptor protein?
9. Consider the signal transduction pathway above. Label the following components of the pathway: ligand, receptor, secondary messengers, protein kinase, amplification 10. What is the specific name of the molecules that are serving as secondary messengers in the signal transduction pathway above? a. What is the role of secondary messengers? b. Name one other substance known to function in this capacity
Discuss Concepts Describe the possible ways in which a G-proteincoupled receptor pathway could become defective and not trigger any cellular responses.
Which of the following could not elicit a signal transduction response? a. a protein kinase b. a virus mimicking a normal signal molecule c. a peptide hormone d. a steroid hormone e. a neurotransmitter
In signal transduction, which of the following is not a target protein? a. proteins that regulate gene activity b. hormones that activate the receptor c. enzymes of pathways d. transport proteins e. enzymes of cell reactions
How is endocrine signaling different from autocrine signaling?
1. If neither Viagra or ginseng works to fix the cat's problem, what protein(s) would you suspect is “broken” in this signalling pathway? 2. Why?
3. How does dimerization of a receptor tyrosine kinase promotes autophosphorylation of the intracellular domain of the receptor? How does the formation of a dimer helps the phosphorylation reaction?4. Describe where is the phosphate group added on a protein when it gets phosphorylated (what amino acid? what atom?). Then list all the ways that protein function may change after it gets phosphorylated PLEASE ANSWER BOTH
1. The four steps in the signal transduction pathway are listed below, a-d. Label the diagram above with the letters a-d to indicate where on the diagram each step is taking place, and answer the two questions below. a. Signal transmission i. Describe what is taking place during the signal transmission step. b. Reception i. Describe what is taking place during the reception step. Be sure to use the terms ligand, receptor, and target cell. C. Signal transduction d. Response
Which of the following is incorrect about pathways activated by G-proteincoupled receptors? a. The extracellular signaling molecule is the first messenger. b. When activated, plasma membrane-bound G protein canswitch on an effector. c. Second messengers enter the nucleus. d. ATP converts to cAMP to activate protein kinases. e. Protein kinases phosphorylate molecules to change cellularactivity.
A scientist notices that when she adds a small, water-soluble molecule to a dish of cells, the cells turn off transcription of a gene. She hypothesizes that the ligand she added binds to a(n)____receptor. Intracellular Hormone Enzyme-linked Gated ion channel-linked
During signal transduction (a) the cell converts an extracellular signal into an intracellular signal that leads to a change in some cell process (b) a signaling molecule directly activates or represses several genes (c) each enzyme catalyzes production of one molecule of product (d) enzymes in the signal cascade remain active until the last component of the pathway alters a cellular process (e) the signal is terminated by cyclic AMP