BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 9, Problem 14RQ
What is the function of a phosphatase?
- A phosphatase removes phosphorylated amino acids from proteins.
- A phosphatase removes the phosphate group from phosphorylated amino acid residues in a protein.
- A phosphatase phosphorylates serine, threonine, and tyrosine residues.
- A phosphatase degrades second messengers in the cell.
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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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- The phosphorylation and dephosphorylation of proteins is a vital means of regulation. Protein kinases attach phosphoryl groups, whereas only a phosphatase will remove the phosphoryl group from the target protein. What is the energy cost of this means of covalent regulation?arrow_forwardWatch this video and answer the question below https://youtu.be/AtlCxYDxY1I BCR-ABL is a kinase. A kinase is a type of enzyme that catalyzes the transfer of phosphate from one molecule to another. What are the substrates for the reaction that BCR-ABL catalyzes? Select all that are true.a- Substrate protein b- BCR-ABL c-ATP d- None of the listed molecules herearrow_forwardWhat is the enzymatic activity of sodium-potassium ATPase (pump)? binds to and hydrolyzes ATP; binds to 3 Na+ in cytoplasm and releases outside cell; binds to 2 K+ outside cell and releases into cytoplasm binds to and hydrolyzes ATP; binds to 2 Na+ in cytoplasm and releases outside cell; binds to 3 K+ outside cell and releases into cytoplasm binds to and hydrolyzes GTP; binds to 3 Na+ in cytoplasm and releases into nucleus; binds to 2 K+ inside cell and releases into lysosome binds to and hydrolyzes 3 ATP; binds to 1 Na+ in cytoplasm and releases outside cell; binds to 1 K+ outside cell and releases into cytoplasmarrow_forward
- Most hormones, such as peptide hormones, exert their effects by binding to cell- surface receptors. However, steroid hormones do so by binding to cytosolic receptors. How is this possible?arrow_forwardThe activity of an enzyme can be altered when it becomes negatively charged due to: phosphate removal by a kinase, which is called dephosphorylation phosphate removal by a phosphatase, which is called dephosphorylation phosphate removal by a kinase, which is called phosphorylation phosphate addition by a phosphatase, which is called dephosphorylation phosphate addition by a kinase, which is called phosphorylationarrow_forwardThe biomolecular interaction between protein receptors and ligands is similar to that of en- zymes and substrates, which depends in part on the shape of the protein. The shape of a protein, in turn, depends on the presence of appropriate chemical bonds in the protein. Many common medications function by altering the interactions between protein receptors and ligands, thereby interfering with the normal response of a cell to specific signals. Which of the following best describes a mechanism by which a drug might interfere with a normal cellular response? A B A medication causes the cell to become more permeable and unable to maintain the conditions that allow a normal response. с A medication interrupts the electron transport chain in a cell and makes it unable to syn- thesize sufficient ATP. D A medication enters the nucleus of a cell and alters the nucleic sequence for a specific receptor protein. A medication enters a target cell and acts as an inhibitor to an intercellular protein…arrow_forward
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