BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Chapter 9, Problem 29CTQ
What would happen if the intracellular domain of a cell-surface receptor was switched with the domain from another receptor?
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Draw a diagram of a membrane receptor and include the following details. Include a depiction of the plasma membrane with which it is associated; label the locations of the extracellular space, the cytoplasm, and the ligand-binding domain.
Very briefly, explain how a ligand binding to the extracellular receptor region of a GPCR causes a change in biological events inside the cell.
What are the three types of cell signal receptors found in the plasma membrane?
Chapter 9 Solutions
BIOLOGY 2E
Ch. 9 - Figure 9.8 HER2 is a receptor tyrosine kinase. In...Ch. 9 - Figure 9.10 In certain cancers, the GTPase...Ch. 9 - Figure 9.17 Which of the following statements...Ch. 9 - Figure 9.18 What advantage might biofilm...Ch. 9 - What property prevents the ligands of cell-surface...Ch. 9 - The secretion of hormones by the pituitary gland...Ch. 9 - Why are ion channels necessary to transport ions...Ch. 9 - Endocrine signals are transmitted more slowly than...Ch. 9 - A scientist notices that when she adds a small,...Ch. 9 - Where do DAG and IP3 originate? They are formed by...
Ch. 9 - What property enables the residues of the amino...Ch. 9 - Histamine binds to the H1 G-protein-linked...Ch. 9 - A scientist observes a mutation in the...Ch. 9 - What is the function of a phosphatase? A...Ch. 9 - How does NF-kB induce gene expression? A small,...Ch. 9 - Apoptosis can occur in a cell when the cell is...Ch. 9 - What is the effect of an inhibitor binding an...Ch. 9 - How does PKC’s signaling role change in response...Ch. 9 - A scientist notices that a cancer cell line fails...Ch. 9 - Which type of molecule acts as a signaling...Ch. 9 - Quorum sensing is triggered to begin when...Ch. 9 - A doctor is researching new ways to treat biofilms...Ch. 9 - What is the difference between intracellular...Ch. 9 - How are the effects of paracrine signaling limited...Ch. 9 - What are the differences between internal...Ch. 9 - Cells grown in the laboratory are mixed with a dye...Ch. 9 - Insulin is a hormone that regulates blood sugar by...Ch. 9 - The same second messengers are used in many...Ch. 9 - What would happen if the intracellular domain of a...Ch. 9 - If a cell developed a mutation in its MAP2K1 gene...Ch. 9 - What is a possible result of a mutation in a...Ch. 9 - How does the extracellular matrix control the...Ch. 9 - A scientist notices that a cancer cell line shows...Ch. 9 - What characteristics make yeasts a good model for...Ch. 9 - Why is signaling in multicellular organisms more...Ch. 9 - Pseudomonas infections are very common in hospital...
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- Explain why a peptide (protein) ligand can’t use a receptor inside the cell while an asteroid has no problem using an intracellular receptor.arrow_forwardWhat is the main benefit of cell signaling via direct physical contact and cell signaling over short distances (ex: nerve cell signaling)?arrow_forwardDifferent cell types express different types of receptors; even asingle cell may express multiple receptor types. Explain?arrow_forward
- Name and define (briefly) the four different types of receptors involved in Cellsignaling. Give an example of a ligand and specific type of receptor (where would you find the receptor?) for one of the receptors defined.arrow_forwardWhat common features are shared by most cell signaling systems?arrow_forwardIntegrins have many functions, one of which is sensing connections to the extracellular matrix. What is the role of FAK in integrin signaling?arrow_forward
- You have isolated a new species of infectious bacteria. The bacterium releases a toxin that you believe is adversely affecting heterotrimeric Gs (stimulatory)-protein-based signaling. To explore this hypothesis you use an epithelial cell line that is expressing a cyan fluorescent protein (CFP)-labeled α subunit and a yellow fluorescent protein (YFP)-labeled β subunit of a heterotrimeric Gs-protein. CFP emits blue light and has excitation and emission wavelengths of 440 nm and 490 nm, respectively. YFP emits yellow light and has excitation and emission wavelengths of 490 nm and 527 nm, respectively. To test your hypothesis, you perform two experiments. First, you apply a signaling ligand known to activate this Gs protein and track yellow fluorescence. Second, you apply the signaling ligand and the purified bacterial toxin simultaneously and track yellow fluorescence. Which of the following conclusion will you draw based on the above experimental data? The toxin locks the α subunit…arrow_forwardYou perform a competition study on a GPCR. You have isolated the plasma membrane from cells which contains the GPCR of interest. If an agonist and an inverse agonist are at equal concentrations in your study but the inverse agonist has a 10 x higher affinity for the receptor than the agonist, what would you expect to be the overall outcome to be? More of the agonist is bound and so most of the receptor is in its active conformation and is stimulated More of the inverse agonist is bound and so most of the receptor is in its inactive conformation and is unstimulated.arrow_forwardwhich DNA binds to recipient cell at receptor site.?arrow_forward
- 3) The “Met" receptor is a membrane receptor protein responsible for initiating signal transduction pathways that cause cells to divide, among other things. After the Met receptor has been stimulated by its specific growth factor, another protein called c- Cbl will bind to the Met receptor. C-Cbl will then attach a chain of small proteins called ubiquitin to the Met receptor. These chains of ubiquitin help the cell recognize that the Met receptor should undergo receptor-mediated endocytosis, which eventually leads to the destruction of the Met receptor. Circle any answer or answers that include mutations that could cause the cell to potentially become a cancer cell. A) a mutation causing there to be too much ubiquitin protein produced. B) a mutation causing c-Cbl to be inactivated. C) a mutation causing ubiquitin to be inactivated. D) a mutation causing there to be too few Met receptors produced. E) a mutation causing the Met receptor to no longer be able to bind to its growth factor.…arrow_forwardWhat is a signal-transduction pathway? Why are mutations in components of signal-transduction pathways often associated with cancer?arrow_forwardThe G protein coupled receptor (GPCR) pathway elicits diverse intracellular responses in different cells. The basic steps of GPCR signaling are outlined in this diagram. Which of the following statements correctly describes the process of GPCR signaling? The GPCR activation is reversible after the signal of the ligand diminishes. The membrane-embedded enzyme uses GTP as a secondary messenger to initiate gene expression. The ligand attaches to both the GPCR and the membrane-embedded enzyme to activate the GPCR pathway. The ligand-bound GPCR sends a GTP molecule to an enzyme in the membrane and switches it into an active state.arrow_forward
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