Describe in your own words how nuclear transport and G protein coupled receptor (GPCR) signaling will be affected if GTP levels suddenly fall in body cells. Explain the importance of GTP in nuclear import/export and vesicular formation. Please answer asap and type your answer and do not copy from anywhere please

Describe in your own words how nuclear transport and G protein coupled receptor (GPCR) signaling will be affected if GTP levels suddenly fall in body cells. Explain the importance of GTP in nuclear import/export and vesicular formation. Please answer asap and type your answer and do not copy from anywhere please

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter9: Cell Communication

Section: Chapter Questions

Problem 1VCQ: Figure 9.8 HER2 is a receptor tyrosine kinase. In 30 percent of human breast cancers, HER2 is...

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Figure 9.8 HER2 is a receptor tyrosine kinase. In 30 percent of human breast cancers, HER2 is permanently activated, resulting in unregulated cell division. Lapatinib, a drug used to treat breast cancer, inhibits HER2 receptor tyrosine kinase autophosphorylation (the process by which the receptor adds phosphates onto itself), thus reducing tumor growth by 50 percent. Besides autophosphorylation, which of the following steps would be inhibited by Lapatinib? Signaling molecule binding, dimerization, and the downstream cellular response. Dimerization, and the downstream cellular response. The downstream cellular response. Phosphatase activity, dimerization, and the downsteam cellular response.
When nerve cells contact each other, they form adherens junctions (AJs) at the point of contact. The main transmembrane (TM) protein in the junctions is N-cadherin. N-cadherin is a single pass TM protein with a short intracellular domain and a large extracellular domain on the amino end. Proper formation of the AJs requires both actin (MF) and microtubules (MTs). Motor proteins for MTs are dynein (-) end and kinesin (+) end (and were discovered by Michael Sheetz). Maintenance of preformed AJs requires MFs . Adding drugs that disrupt MFs causes AJs to fall apart, and the N-cadherin is removed from the PM (by endocytosis). If the drugs are removed, MTs (& MFs) are required to restore the N-cadherin to the plasma membrane. choose answer for D1 and D2 D. Suppose cells contain a soluble kinase that modifies N-cadherin that has been removed from the PM. D-1. The kinase could catalyze modification(s) of the side chains of amino acids near (the N end) (the C end) (either end, but not…
Familial hypercholesterolemia (FH) is an inherited disease characterized by high blood levels of cholesterol, xanthomas (lipid-laden nodules that develop under the skin near tendons), and early-onset atherosclerosis (the formation of yellowish plaques within arteries). In the milder form of this disease, patients have half the plasma membrane low-density lipoprotein (LDL) receptors needed for cells to bind to and internalize LDL (a plasma lipoprotein particle that transports cholesterol and other lipids to tissues). These individuals have their first heart attacks in young adulthood. In the severe form of FH, in which affected individuals have no functional LDL receptors, heart attacks begin at about age 8, with death occurring a few years later. Based on what you have learned in this chapter, briefly describe the cellular processes that are defective in FH.
GTP binding proteins are molecular switches. How do GTP binding proteins work? Provide two examples of GTP binding proteins that function in intracellular protein transport. Make a drawing that illustrates the function of each of these proteins in their respective roles. Predict the direct outcome of a mutation that: Inhibits GTPase activity Inhibits interaction with the GEF
A defective autophagic system in a cell may result in p62 accumulation, inhibition of nuclear factor kappa B, promote chronic inflammation and cause liver tumorigenesis. Group of answer choices True False
G protein coupled receptors play an important role in signal transduction in many cells. Label the four essential components of the G protein coupled receptor signaling system (blanks a-d in the picture) by choosing from the menus below. a b b Each answer will be used at most once, while some will not be used at all (select one for each): Group of answer choices transcription factor с transcription factor Show Transcribed Text d transcription factor B C. transcription factor G protein second messenger G protein second messenger IE G protein second messenger G protein second messenger receptor receptor receptor receptor enzyme enzyme enzyme enzyme steroid hormone steroid hormone steroid hormone steroid hormone
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