Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 9.1, Problem 1CC
Figure 9.1 Response of a yeast cell to glucose. When glucose is absent from the extracellular environment, the cell is not well prepared to take up and
What is the signaling molecule in this example?
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Chapter 9 Solutions
Biology
Ch. 9.1 - Figure 9.1 Response of a yeast cell to glucose....Ch. 9.1 - Prob. 1CSCh. 9.1 - Which type of signal, paracrine or endocrine, is...Ch. 9.1 - Prob. 3CCCh. 9.2 - Prob. 1CSCh. 9.2 - Prob. 2CSCh. 9.2 - Prob. 1CCCh. 9.3 - Prob. 1CSCh. 9.3 - Prob. 1CCCh. 9.3 - Prob. 2CC
Ch. 9.3 - In the case of signaling pathways involving...Ch. 9.5 - Prob. 1EQCh. 9.5 - Prob. 2EQCh. 9.5 - Prob. 3EQCh. 9.5 - Prob. 1CCCh. 9 - Prob. 1TYCh. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Prob. 5TYCh. 9 - The relay protein Ras is part of the EGF pathway...Ch. 9 - Prob. 7TYCh. 9 - Prob. 8TYCh. 9 - Prob. 9TYCh. 9 - Prob. 10TYCh. 9 - Prob. 1CQCh. 9 - Conceptual Questions What are the three stages of...Ch. 9 - Prob. 3CQCh. 9 - Prob. 1COQCh. 9 - Prob. 2COQ
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- Describe signaling pathways involving intracellular receptors (. Then, explain why a ligand would use an intracellular receptor as opposed to a transmembrane receptorarrow_forwardN Signal Sequence The schematic above depicts a protein with the indicated signaling sequences along its length. Based on these signaling sequences what type of protein is this? N-X-S/T there is not enough information to determine A secreted peptide hormone A lysosomal hydrolase A glycoproteinarrow_forwardThe responses of the cell signalling can be in the nucleus or in the cytoplasm. Describe the mechanisms for these two different responses.arrow_forward
- Please help me with this question. More than one answer may be correct. G-proteins ______. Options: A) bind GTP or GDP B) are heterotrimers C) will dissociate into α and βγ subunits when activated D) will leave the cell and carry a signal to other cells E) are part of a second messenger systemarrow_forwardCell signaling in plant and animal cells is similar in some ways and different in others. What are some examples of this?arrow_forwardSecond-messenger systems ultimately bring about the desired cell response by inducing a change in the shape and function of particular designated intracellular proteins. (True or false?)arrow_forward
- Paracrine signaling is characterized by ligands that are __________. produced by the cell itself secreted by neighboring cells secreted by distant cells transported to distant cells secreted in inactive formarrow_forwardFor instance, β-catenin is involved in cellular adhesion as well as proliferation. Estrogen can be protective for the heart, but also drive cancer. With how complicated signaling pathways are, why would there be one protein or molecule that can have such different functions?arrow_forwardExposing cells to which of the following drugs would inhibit the slow output response of a cell to a signaling ligandwithout having an effect on the fast output response ? A. Latrunculin - a molecule isolated from sponges, which binds near the nucleotide-binding cleft of monomericactin.B. Taxol - a molecule isolated from the bark of the pacific yew, which that stabilizes microtubules.C. Alpha-amanitin - a molecule isolated from deathcap mushrooms, which blocks RNA polymerase II.D. Phalloidin - a molecule isolated from deathcap mushrooms that stabilizes f-actin.E. Sodium orthovanadate - a molecule that inhibits alkaline and tyrosine phosphatases.arrow_forward
- What is the intracellular signaling molecule that causes the mechanism above to happen? said another way: you were told that smooth muscle is more responsive to hormone and that this did something to receptors. From here you had to decide above if this is up or downregulation of receptors and if this occurs via endo or exocytosis. What is the intracellular signal that makes this endo or exocytosis happen? Intracellular concentration rises for CAMP Intracellular concentration rises for calcium Intracellular concentration rises for potassium G-proteins are activated Kinases are activatedarrow_forwardA signaling molecule M is active when it is phosphorylated (M-P). The M-P has downstream target molecules in nucleus. Provide a possible mechanism by which M does its jobarrow_forwardRTK: What would the following double mutations mean for the status of the signaling pathway, and the phosphorylation of MAPKK (MEK)? 1. Ligand is bound to the receptor; MAPK T120A mutation (T120 is normally phosphorylated by MAPKK) a) Pathway ON (final output is achieved) b) Pathway OFF (no final output) c) Phosphorylation of MAPKK MEK d) NO Phosphorylation of MAPKK MEK 2) Ligand is not bound to the receptor; MAPKKK T132E mutation (T132 is normally phosphorylated by Ras) a) Pathway ON (final output is achieved) b) Pathway OFF (no final output) c) Phosphorylation of MAPKK MEK d) NO Phosphorylation of MAPKK MEKarrow_forward
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