12. Which of the following conclusions can be made abou sed on the students\' da

Question

12. Which of the following conclusions can be made abou sed on the students' data? the effect of the wattage of light on photosynthesis ba hows that the higher the-wattage-of light, the more the hi a. Comparing trials 1 and4 photosynthesia s 1, 2, and 3 shows that the higher the wattage ofl more photosynthesis occurs. photosynthesis. photosynthesis occurs- ls 1, 2, and 3 shows that the higher the wattage of light, the 3 and 4 shows that the wattage of light has no effect on b. Comp d. Comparing trials 2 and-3-shows-tha 13. if an animal ceit were subjected to an environment that decreased me ts G protein-coupled receptor signaling system fluidity, what might happen to i d be able to carry out reception and transduction but would not be a. It woul able to respond to a si b. Itwould use ATP instead of GTP to activate and inactivate the G prote c. it wouid not be abie to bind the signaling molecuie. d. It would not be able to complete the transduction steps. 14. The G protein of a GPCR system is mutated so that it is unable to hydrolyze GTP to GDP. Which of the following would you observe in this cell? The G protein-coupled receptor is continually activated by permanently binding to its ligand. a. b. The G protein-coupled receptor is inhibited by the continuous presence of GTP The G protein stays activated and continuously activates the transduction enzyme. The G protein cannot be activated and there is no cellular response. c. d. 15. Particular receptor tyro sine kinases (RTKs) that promote excessive cell division are found in high levels on various cancer cells. HER2 is one RTK receptor that is sometimes found in excessive levels on breast cancer cells. Herceptin is a breas rancer drug that works on these types of cells. Which of the following could explain how Herceptin helps treat breast cancer? Herceptin competitively inhibits the HER2 ligand binding site. Herceptin promotes dimerization of HERZ receptors. Herceptin increases the cell division response in cancer c c. erceptin acts as a ligand to signal the production of more HER2 receptors.

Explanation / Answer

13. B

14. C - The G protein stays activated and continuously activates the transduction enzyme.

15. A Herceptin competitively inhibits HER-2 ligand binding sites.
Herceptin attaches to the HER2 receptors to prevent cells from multiplying

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