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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Textbook Question
Chapter 12.3, Problem 3CC
MAKE CONNECTIONS → Explain how receptor tyrosine kinases and intracellular receptors might function in triggering cell division. (Review Figures 11.8 and 11.9 and Concept 11.2.)
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MAKE CONNECTIONS Review Figure 12.16 on cell cyclecontrol. Would you expect MPF (maturation-promotingfactor) activity to remain steady during cleavage? Explain.
. MAKE CONNECTIONS The p53 protein can activategenes involved in apoptosis. Review Concept 11.5, anddiscuss how mutations in genes coding for proteins thatfunction in apoptosis could contribute to cancer.
MAKE CONNECTIONSPDGF signals cells by binding toa cell-surface receptor tyrosinekinase. If you added a chemicalthat blocked phosphorylation,how would the results differ?(See Figure 11.8.)
Chapter 12 Solutions
Campbell Biology (11th Edition)
Ch. 12.1 - How many chromosomes are drawn in each part of...Ch. 12.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 12.2 - How many chromosomes are shown in the illustration...Ch. 12.2 - Compare cytokinesis in animal cells and plant...Ch. 12.2 - During which stages of the cell cycle does a...Ch. 12.2 - Compare the roles of tubulin and actin during...Ch. 12.2 - A kinetochore has been compared to a coupling...Ch. 12.2 - MAKE CONNECTIONS What other functions do actin...Ch. 12.3 - In Figure 12.14, why do the nuclei resulting from...Ch. 12.3 - How does MPF allow a cell to pass the G2 phase...
Ch. 12.3 - MAKE CONNECTIONS Explain how receptor tyrosine...Ch. 12 - Differentiate between these terms: chromosome,...Ch. 12 - In which of the three phases of interphase and the...Ch. 12 - Explain the significance of the G1, G2, and M...Ch. 12 - Through a microscope, you can see a cell plate...Ch. 12 - Vinblastine is a standard chemotherapeutic drug...Ch. 12 - One difference between cancer cells and normal...Ch. 12 - The decline of MPF activity at the end of mitosis...Ch. 12 - In the cells of some organisms, mitosis occurs...Ch. 12 - Which of the following does not occur during...Ch. 12 - Cell A has half as much DNA as cells B, C, and D...Ch. 12 - The drug cytochalasin B blocks the function of...Ch. 12 - VISUAL SKILLS The light micrograph shows dividing...Ch. 12 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 12 - EVOLUTION CONNECTION The result of mitosis is that...Ch. 12 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 12 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- What does the ability to produce iPSCs tell scientists about the differences between ES cells and differentiated cells? Do these findings argue against the principle of nuclear equivalence? Explain your answer.arrow_forwardMAKE CONNECTIONS Explain how the signaling molecules released by an embryonic cell can induce changesin a neighboring cell without entering the cell. (SeeFigures 11.15 and 11.16.)arrow_forwardMAKE CONNECTIONS Evaluate whether the originof cell-to-cell attachment proteins in animals illustratesdescent with modification. (See Concept 22.2.)arrow_forward
- MAKE CONNECTIONS Why is a cell-surface receptor protein notrequired for this steroid hormone to enter the cell? (See Concept 7.2.)arrow_forwardMAKE CONNECTIONS Chromosomescontain the genetic material and reside in thenucleus; how does the rest of the cell get accessto the information they carry?arrow_forwardVISUALIZE Sketch a roughly cuboidal cell preparing to divide. Indicate the orientation of the preprophase band and the site where the new cell walls of the daughter cells will form.arrow_forward
- MAKE CONNECTIONS The gene that is activated onthe Philadelphia chromosome codes for an intracellulartyrosine kinase. Review the discussion of cell cycle controlin Concept 12.3, and explain how the activation of thisgene could contribute to the development of cancer.arrow_forwardWHAT IF? If apoptosis occurred when it should not,what types of protein defects might be the cause? Whattypes could result in apoptosis not occurring when itshould?arrow_forwardMAKE CONNECTIONS Inactivation of one of the Xchromosomes in female mammals involves lncRNA calledXIST RNA, mentioned in this section and in Concept 15.2.Describe transcription and binding of XIST RNA, thensuggest a model for how it initiates Barr body formation.arrow_forward
- Think about the types of cellular processes that occur within the nucleus of a cell and the types of molecules that need to be transported in and out of the nucleus. How might the blocking of nuclear pores via huntingtin protein aggregates impact the function of a brain neuron?arrow_forwardINTERPRET data An investigator has isolated two mutant strains of yeast that fail to secrete a short polypeptide. She fractionated the cells and compared the concentrations of this polypeptide in the different cellular fractions with those found in normal cells. What point in the secretory pathway would you expect would be defective for mutant a and mutant b?arrow_forwardCell Biology: Q. What are the proteins involved in the cortex and briefly describe how do they interact in its formation? Notes: cell cortex is under a blood cell, makes cell stronger (stable) (attachment proteins)arrow_forward
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