Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 11, Problem 11.5CR
What is an explanation for the similarities between genes in yeasts, nematodes, and mammals that control apoptosis?
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Chapter 11 Solutions
Campbell Biology (11th 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. 11.3 - 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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- Part A and B A. What below would be likely to lead to cancer development? A) Overexpression of a cell cycle checkpoint inhibitor B) Loss of expression of a growth factor that promotes cell cycle entry C) Overexpression of a receptor tyrosine kinase that promotes cell cycle entry D) Overexpression of a DNA damage repair enzyme E) Loss of expression of a regulatory transcription factor that activates transcription of a cyclin B. Taxols inhibit the proper function of microtubules and are frequently used as chemotherapy drugs. What is the function of microtubules during the cell cycle? A) They promote the G1 to S checkpoint B) They normally inhibit M phase from being completed C) They form the mitotic spindle E) They mediate DNA replication F) They form the cleavage furrow during cytokinesisarrow_forwardWhy is it disadvantageous for single-celled eukaryotes such as yeast to undergo apoptosis?arrow_forwardThe number and complexity of gene families linked with cell adhesion and cell signaling pathways has increased during many of the distinct transitions to multicellularity. Why would this be the case? Why is it unexpected that the emergence of multicellularity is frequently associated with an increase in gene families connected with cell–cell signaling?arrow_forward
- Almost all cells within an animal contain DNA with the same sequence, yet different cells can have very different properties and gene expression patterns. What are the primary mechanisms that facilitate the existence of distinct cell types in eukaryotes?arrow_forwardwhich of the following correctly describes how protein kinase A can activate genes? A: nuclear protein kinase A is activated by cAMP to phosphorylate general transcription factors B: cytosolic protein kinase A is activated by cAMP to release the catalytic subunits, which move into the nucleus and phosphorylate CREB C: cytosolic protein kinase A is activated by cAMP to release the catalytic subunits, which move into the nucleus and phosphorylate general transcription factors D: G protein-coupled receptors may be desensitized by serine phosphorylationarrow_forwardWhat are the functions of transcriptional activator proteins and repressor proteins? Explain how they work at the molecular level.arrow_forward
- You are interested in studying a novel gene that appears to be involved in cancer. There is no information about the function of this gene. What would you do to obtain the cDNA for this gene? How would you express this gene and what expression systems might you utilize to study its function and why? How would determine the subcellular localization of this gene in eukaryotic cells? What are alternative methods in case one doesn't work? How would you purify and determine the 3-dimensional structure of this protein?arrow_forwardMyc is a family of regulator genes that code for transcription factors. c-myc was the first gene to be discovered in this family, and c-myc is dependent on mitogenic stimulation for its expression and function. c-myc transcribes a number of genes involved in G1/S cell cycle progression, such as CDK4 and cdc25A Which of the following are true for the c-myc gene? Select all that apply In cancer or transformed cells, the c-myc gene mutation would be recessive, and a loss of function mutation The c-myc gene is a tumor suppressor gene In cancer or transformed cells, the c-myc gene mutation would be dominant, and a gain of function mutation The c-myc gene is a proto-oncogenearrow_forwardContrast the role of the MCM1 protein in different yeastcell types shown in Figure 12-10. How are the a-specificgenes controlled differently in different cell types?arrow_forward
- Most organisms display a circadian rhythm, a cycling of biological processes that is roughly synchronized with day length. In Drosophila, pupae eclose (emerge as adults after metamorphosis) at dawn. a)Using this knowledge how would screen for Drosophila mutants that have an impaired circadian rhythm? b)In each case, how would you clone the genes you identified by mutation?arrow_forwardA cell inherits a mutation in a gene that results in a transcription factor, called NF-kB, constantly being in its active conformation. When active, NF-kB stimulates the expression of cyclins that promote progression of the cell cycle, regardless of other conditions. As a result of this mutation, how would this cell's phenotype be affected by this mutation? A) This cell would have a cancer phenotype B) This cell would grow larger in size, but would never divide C) This cell would likely undergo apoptosis D) This cell would not duplicate its chromosomes .arrow_forwardFor each of the following situations, provide a plausible explanation for how it could lead to unrestricted cell division.(a) Colon cancer cells often contain mutations in the gene encoding the prostaglandin E2 receptor. PGE2 is a growth factor required for the division of cells in the gastrointestinal tract.(b) Kaposi sarcoma, a common tumor in people with untreated AIDS, is caused by a virus carrying a gene for a protein similar to the chemokine receptors CXCR1 and CXCR2. Chemokines are cell-specific growth factors.(c) Adenovirus, a tumor virus, carries a gene for the protein E1A, which binds to the retinoblastoma protein, pRb. (d) An important feature of many oncogenes and tumor suppressor genes is their celltype specificity. For example, mutations in the PGE2 receptor are not typically found in lung tumors. Explain this observation. (Note that PGE2 acts through a GPCR in the plasma membrane.)arrow_forward
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