PEARSON ETEXT FOR CAMPBELL BIOLOGY
12th Edition
ISBN: 9780135988046
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 12.2, Problem 4CC
Compare the roles of tubulin and actin during eukaryotic cell division with the roles of tubulin-like and actin-like proteins during bacterial binary fission.
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You discover a substance that prevents the motor protein in a centromere from attaching to a spindle fiber. What would be a consequence of adding this substance to a cell during mitosis?
Group of answer choices
A) the chromatin would not coil up to form condensed chromosomes
B) the nuclear membrane would not break down
C) sister chromatids would not form
D) sister chromatids would fail to separate
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Describe a possible mechanism on how signaling pathways might impact the cytoskeleton, so that cell migration could be regulated in a localized manner within a multicellular organism. (hint: think about the possible transcriptional regulation of the G-protein regulators)
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The nucleus
a) has a single membrane and compartmentalizes the genetic material
b) has a double membrane joined by nuclear pores, is continuous with the endoplasmic reticulum membrane, and compartmentalizes the nuclear genetic material
c) has a double membrane joined by nuclear pores, is continuous with the smooth endoplasmic reticulum membrane only, and compartmentalizes the nuclear genetic material
d) None of these are accurate
Chapter 12 Solutions
PEARSON ETEXT FOR CAMPBELL BIOLOGY
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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Problem Set
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- The separation of the parent cell into two daughter cells fails to occur during the process of binary fission. Based on your knowledge of cell constriction in bacteria, what protein may be missing in the system (i.e the protein was not expressed)?arrow_forwardThe nucleus is the largest of the eukaryotic organelles and contains the genome of the organism. a) describe the proteins and process of nuclear import and export. b) describe, in general terms, an experiment that could be conducted to show that there are specific signals for nuclear import or export.arrow_forwardAcross 18.) structure consisting mainly of microtubúles that provides the framework for chromosome movement during cell division 2. 3 14 15 17 19.) the stage of cell division in which the cytoplasm divides to fórm two daughter cells 18 9. 10 11 12 13 14 Down 15 16 17 10.) a pair of small cylindrical organelles lying at right angles to each other near the nucleus in the cytoplasm of animal cells 18 19 20 11.) positively, charged proteins around which DNA is packaged 14 ०botinn th Lronaatingarrow_forward
- 50. Cell motility involves the coordination of many events in the cell. In cells lacking flagella/cilia, which of the following are NOT required for cell motility? a) extension of actin filaments b) transmembrane proteins associating with extracellular matrix proteins in the underlying surface c) myosin-mediated contraction at the rear of the moving cell d) formation of a microtubule array in the leading edge of the cell e) formation of plasma membrane extensions such as pseudopodia or filopodiaarrow_forwardGive the respective structural descriptions and functions of the following: 1. Cell Membrane 2. Nucleus 3. Nucleolus 4. Smooth Endoplasmic Reticulum 5. Rough Endoplasmic Reticulum 6. Nuclear Membrane 7. Mitochondria 8. Golgi Apparatus 9. Cytoskeletonarrow_forwardAnswer the Guide Question: a) Each cell in an organism has all of the basic parts. Each has a function that benefits the other cells, how might the presence of different cell structures in plant and animal help them perform their functions as an organism. Explain. b) Why is the cell membrane considered as the guard of the cell? c) Why is the lysosome considered as the suicide bag of the cell?arrow_forward
- The mitotic spindle plays a critical role in which of the following processes? a) dissolving the nuclear membrane b) triggering the compaction and condensation of chromosomes c) splitting of the cell (cytokinesis) following mitosis d) separation of sister chromatidsarrow_forwardWhich is true of Prokaryote cells? A) Because their DNA exists in a nucleoid area, the synthesis of proteins depends on random interactions between mRNA and rRNA, B) They contain membrane-bounded compartments or organelles. C) A true nucleus contains the DNA in the form of chromosomes D) Some contain mitochondria E) They contain many organelles in the cytoplasmarrow_forwardThe cell division process that cells in culture undergo includes the following stages in temporal order: O a) Telophase, anaphase, prophase, metaphase O b) Anaphase, metaphase, prophase, telophase O c) Metaphase, prophase, telophase, anaphase O d) Prophase, metaphase, anaphase, telophasearrow_forward
- Explain in detail how cytoskeletal elements function at a molecular level to bring about movement in eukaryotic cells.arrow_forwardName the two places in the eukaryotic cell where the cell component Ribosome, mRNA, tRHA and rRNA are found?arrow_forwardWhich of the following is a feature common to all three components of the cytoskeleton?arrow_forward
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