Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 9.2, 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
List and describe the three main types of cytoskeleton. If you wanted to do immunocytochemistry to specifically stain each type of cytoskeleton, what is a protein that could be used for each cytoskeletal type (in other words, what is a unique protein for each cytoskeletal type)?
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How is the growth and shrinking of microtubules regulated? Then describe the roles of microtubules in: chromosomal separation during mitosis and the movement of organelles and vesicles within a cell.
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)
What are 2 main challenges of protein targeting? Then describe one way these challenges are overcome during signal-based targeting and one way…
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 9 Solutions
Campbell Biology In Focus
Ch. 9.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 9.2 - Compare cytokinesis in animal cells and plant...Ch. 9.2 - Prob. 3CCCh. 9.2 - Compare the roles of tubulin and actin during...Ch. 9.3 - Prob. 1CCCh. 9.3 - Prob. 2CCCh. 9.3 - Compare and contrast a benign tumor and a...Ch. 9.3 - Prob. 4CCCh. 9 - Through a microscope, you can see a cell plate...Ch. 9 - In the cells of some organisms, mitosis occurs...
Ch. 9 - Which of the following does not occur during...Ch. 9 - Prob. 4TYUCh. 9 - The drug cytochalasin B blocks the function of...Ch. 9 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 9 - The light micrograph shows dividing cells near the...Ch. 9 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 9 - FOCUS ON EVOLUTION The result of mitosis is that...Ch. 9 - SYNTHESIZE YOUR KNOWLEDGE Shown here are two He La...Ch. 9 - FOCUS ON INFORMATION The continuity of life is...
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- In some eukaryote organisms, myocytes are a type of stem cell that become Muscle cells. These cells filled with a protein called myosin. Such cell products are stored in cell structures that are formed from: A) the nucleus, B) from the smooth ER as vesicles, C) are engulfed into the cell by phagocytosis, D) are released from the cell by the process of Exocytosis, E) the lysosomes.arrow_forwardThe interphase is the part of the eukaryotic cell cycle that is most transcriptionally active. Gene regulation during this phase involves changes in the chromatin. a) What is chromatin? b) How can the chromatin structure change?arrow_forwardTelophase in Mitosis a ) Chromosomes begin to uncoil into chromatin. b) Nucleolus and nuclear membrane begin to reappear. c) Spindle slowly dissolves. d) In animal cells, cytokinesis occurs with a cleavage furrow dividing one cell into two cells. e) In plant cells, cytokinesis occurs with the formation of a cell plate. This plate divides the original cell into two cells and is part of the new cell wall.arrow_forward
- 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_forwardWhich of the following is found in binary fission but not in mitosis? a) duplicated chromosomes attach to the plasma membrane b) replicated strands of DNA seperate c) the result produces 2 nuclei d) following the process, a membrane seperates the 2 copies e) replication of DNA begins at an originarrow_forwardA cell in G1 of interphase has 8 chromatins. How many chromosomes and how many DNA molecules will be found per cell as this cell progresses through the following stages: a) metaphase b) anaphase c) after cytokinesis in mitosis d) metaphase I e) anaphase I f) metaphase II g) anaphase II h) after cytokinesis of meiosis IIarrow_forward
- The 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_forwardSuppose cells in an experiment had been labeled with green fluorescent tubulin. At the onset of Anaphase B, you use your laser to bleach a stripe across all of the microtubules on one side of the spindle as shown by the dashed line. This does not hurt the function of the microtubules in any way, but the bleached, nonfluorescent subunits in the microtubules now serve to mark a fixed location relative to the (+) and (-) ends. pl. membr. spindle A. Label one of each of the following: kinetochore MT, astral MT, polar MT. Indicate (+) and (-) ends. B. As the cell progresses through anaphase B, do the bleached spots get closer to, further from, or stay the same distance from the spindle pole they are embedded in? Why? Do they get closer to, further from, or stay the same distance from the plasma membrane? Why?arrow_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_forwarddescribe the process of dynamic instability of the microtubule.arrow_forward
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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY