Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
Chapter 11.1, Problem 1CC
Explain how signaling is involved in ensuring that yeast cells fuse only with cells of the opposite mating type.
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Identify which of the following statements is a lie?
Select one:
a. Yeasts use paracrine signaling to communicate information on mating with other yeast cells.
b. Yeasts are single-celled eukaryotes; therefore, they have a nucleus and organelles characteristic of more complex life forms.
c. Yeast can reproduce sexually through a signaling pathway known as the mating factor pathway.
When a single celled slime mold has run out of food source, the cell will initiate the cell signaling process that results in the release of cyclic-AMP (CAMP). CAMP then
acts as a signal that has two results
1) the cell tells itself it is still in fact without food and to continue the signal
2) the cell tells other local/neighboring single celled slime molds that there is not food near by so they too can scream the CAMP signal of hunger.
What type of signal distance is accomplished in result 17?
O a.
autocrine
O b
endocrine
рarасrine
O d. synaptic
e.
contact dependent
Explain a mechanism for how a nuclear-encoded protein is targeted to the inner membrane of the mitochondrion. Explain the mechanism for how a nuclear-encoded protein is targeted to the thylakoid membrane.
Describe an experiment that could be conducted to show that there is a targeting system for a nuclear encoded protein that ultimately finds its way to a specific organelle.
Chapter 11 Solutions
Campbell Biology (10th Edition)
Ch. 11.1 - Explain how signaling is involved in ensuring that...Ch. 11.1 - In liver cells, glycogen Phosphorylase acts in...Ch. 11.1 - Prob. 3CCCh. 11.2 - Nerve growth factor (NGF) is a water-soluble...Ch. 11.2 - WHAT IF? What would the effect be if a cell made...Ch. 11.2 - MAKE CONNECTIONS How is ligand binding similar to...Ch. 11.2 - Prob. 4CCCh. 11.3 - What is a protein kinase, and what is its role in...Ch. 11.3 - When a signal transduction pathway involves a...Ch. 11.3 - What is the actual signal that is being transduced...
Ch. 11.3 - WHAT IF? If you exposed a cell to a ligand that...Ch. 11.4 - How can a targct cell's response to a single...Ch. 11.4 - WHAT IF? If two cells have different scaffolding...Ch. 11.4 - Prob. 3CCCh. 11.5 - Give an example of apoptosis during embryonic...Ch. 11.5 - WH AT IF? If apoptosis occurred when it should...Ch. 11 - What determines whether a cell responds to a...Ch. 11 - How are the structures of a GPCR and an RTK...Ch. 11 - What is the difference between a protein kinase...Ch. 11 - What mechanisms in the cell terminale its response...Ch. 11 - What is an explanation for the similarities...Ch. 11 - Binding of a signaling molecule to which type of...Ch. 11 - The activation of receptor tyrosinc kinases is...Ch. 11 - Lipid-soluble signaling molecules, such as...Ch. 11 - Consider this pathway: epinephrine G...Ch. 11 - Apoptosis involves all but which of the following?...Ch. 11 - Which Observation suggestcd to Sutherland the...Ch. 11 - Protein phosphorylation is commonly involved with...Ch. 11 - DRAW IT Draw the following apoptotic pathway,...Ch. 11 - EVOLUTION CONNECTION Identify the evolutlonary...Ch. 11 - Prob. 10TYUCh. 11 - SCIENCE, TECHNOLOGY, AND SOCIETY The aging process...Ch. 11 - WRITE ABOUT A THEME: ORGANIZATION The properties...Ch. 11 - SYNTHESIZE YOUR KNOWLEDGE There are five basic...
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- Describe the process by which the forespore influences gene expression in the mother cell during sporulation in B. subtilis. To which of the eukaryotic signaling events described in the book are analogous?arrow_forwardExplain how a flagellum works in the presence of an attractant.arrow_forwardDiagram a pathway of signal transduction including aligand, receptor, and ultimately a transcription factor thatactivates a gene that inhibits the receptor.arrow_forward
- Modify the diagram above to illustrate specific protein(s) that would participate in regulating this pathway if DNA damage was detected in these cells. What effect would this have on the progression of the cell cycle? If there is more than one possible outcome be sure to outline each one.arrow_forwardIdentify which of the following statements is a lie?Select one: a. Budding yeasts first start from being a haploid cell and further becomes a diploid cell. b. Budding yeasts secrete a signaling molecule called a “mating factor”. c. The mating factor in the sexual reproduction of yeast is directed to all yeast cells in the vicinity.arrow_forwardIn Xenopus, one of the substrates of mitotic CDKs is the phosphatase Cdc25. When phosphorylated by mitotic CDKs, Cdc25 is activated. What is the substrate of Cdc25? How does this information help to explain the rapid rise in mitotic CDK activity as cells enter mitosis?arrow_forward
- Which of the following is false about cyclin-cdk complexes? OCdk's do not have to bind to cyclin proteins for complex to be active. OCdk/cyclin complexes phosphorylates proteins required to trigger next cell cycle phase. Process acts as molecular brakes to ensure cell is ready to continue with cell cycle. O Cyclin concentrations increase gradually, but cdk must be phosphorylated by specific kinase for complex to be activearrow_forwardYou stimulated the cell with a ligand and analyzed the response. Upon ligand treatment, the cell increased the expression of gene α and decreased expression of gene β. When you inhibit cyclic AMP production by treating the cell with an inhibitor of Adenylyl cyclase, the increased expression of gene α was not observed but the decrease gene β expression was still observed. a) What you can expect for gene α regulation by this ligand? What signaling mechanism could be used? b) To determine how gene β is regulated by the ligand via what signaling mechanism, provide your hypothesis and indicate a potential experiment that you can perform to test that.arrow_forwardCreate a diagram which illustrates the typical signalling mechanism of action of nuclear receptors and possible routes of communication (autocrine etc.). Should show the specific molecules involved, the mechanisms of signal transduction and indicate the different pathways thgt are activated. It should include a specific example of a receptor, ligand and signalling pathway for each general class. Include as wide a variety of ligands and modes of action as you can. for a novel pathway. Superfamily Give the superfamily to which the receptor belongs Accession Give the Uniprot accession number Name Give the molecule name Species Give the species Ligand What is the ligand, or class of ligands which bind to this receptor? Key physiological What are the physiological processes involved? Is this autocrine, paracrine or endocrine or some combination of them? What is the pathology of the receptor? process involved Mechanism of What are the downstream actions of the receptor? Which molecules does…arrow_forward
- How does a signal that binds to the surface of the cell reach all the way to the nucleus? is this about second massengerarrow_forwardHoney bees are visiting two food sites, A and B, at 6 AM in the morning, as shown in Fig. 1 and Fig. 2. Bees at site A are collecting pollen; those at site B are collecting nectar. When bees from site A return to the nest, they must find a cell in the wax combs and store the pollen (Fig. 3). Bees from site B pass their nectar to young Receiver Bees when they return to the nest (Fig. 4). 1. True or False: At 6 AM, foragers for site A would orient their waggle runs 40 degrees to the left of vertical on the combs. 2. Ture or False: At 6 AM, foragers for site B would orient their waggle runs 105 degrees to the right of vertical. 3. True or Flase: If foragers are still visiting site A at 10 AM, their waggle runs would be oriented 100 degrees to the left of vertical.arrow_forwardHoney bees are visiting two food sites, A and B, at 6 AM in the morning, as shown in Fig. 1 and Fig. 2. Bees at site A are collecting pollen; those at site B are collecting nectar. When bees from site A return to the nest, they must find a cell in the wax combs and store the pollen (Fig. 3). Bees from site B pass their nectar to young Receiver Bees when they return to the nest (Fig. 4). 4. True or False: If foragers are still visiting site B at 10 AM, their waggle runs would be oriented 125 degrees to the right of vertical. 5. True or False: The ability of the foragers to track the passage of time and compensate for the movement of the sun is based on the biological clock located in the deuterocerebrum and involves a 24-hr period of cycling of the genes fem and am-dsx. 6. True or False: The pollen unloading behavior shown in Fig. 3 is a type of associative learning that involves conditioning of the proboscis extension reflex.arrow_forward
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