Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 8.5, Problem 1BC

Look ahead to Figures 13.9 and, in particular, 13.10. Certain mutations alter the structure of the Ras protein so if will not hydrolyze GTR Such mutations cause cancer. Explain why.

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We have studied Ras signal transduction pathway. In an experiment,  two different mutations were produced using different chemicals. The proteins with mutation are listed below. State what will be the effect of each mutation and explain whether it will result in cell proliferation or not.   GEF protein GTPase
6) The functioning of the "Ras/MAPK" signal transduction pathway is absolutely essential in order for cells to grow, divide, and migrate. One important protein that is part of this pathway is BRAF. This protein is a kind of enzyme called a "kinase" – an enzyme that transfers a phosphate group onto another protein. - In some melanomas, a mutated form of BRAF called BRAF Val600AGlu drives the progression of the cancer. The drug “vemurafenib" slows the progression of the cancer by slowing the production of the mutant BRAF protein. (National Cancer Institute. 2019. Types of Cancer Treatment. Retrieved from: https://www.cancer.gov/about-cancer/treatment/types/ Is this an example of a traditional cancer therapy or a targeted therapy? Briefly explain your reasoning in the space provided, using information provided in the text to support your answer. Type of therapy (traditional or targeted)?: Brief explanation: 19
Which of the following mutations would produce a form of the Ras protein that would be more difficult to inactivate than normal Ras? Briefly explain your reasoning.(i) A mutation that allows Ras to cleave (hydrolyze) GTP more rapidly than usual(ii) A mutation that causes Ras to bind Ras-GAP more tightly than usual(iii) A mutation that causes Ras to cleave (hydrolyze) GTP more slowly than usual
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