WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 3, Problem 14SA
Summary Introduction
To review:
The three types of protein fibers that make up the cytoskeleton.
Introduction:
The cytoskeleton is a network of microscopic fibers that are dispersed throughout the cytoplasm. It gives mechanical support to the cell and facilitates the movement of organelles and other substances to various parts of the cell.
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Describe the three types of protein filaments that make up thecytoskeleton.
Describe two similarities and two differences between actin filaments and microtubules.
a) Are actin filaments subject to the same "dynamic instability" as microtubules? Yes or no?
b)Explain how both actin and microtubules polymerize and depolymerize.
Chapter 3 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
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- Microtubules are polar filaments; that is, one end is different from the other. What is the basis for this polarity, how is polarity related to microtubule organization within the cell, and how is polarity related to the intracellular movements powered by microtubule-dependent motors?arrow_forwardList 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)? What are three types of actin structures? Describe the involvement of actin structures in cell migration. 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…arrow_forwardThe cell skeleton In the cell there are three types of filaments that form the cell skeleton. answer:a) What they are b) How they are structured c) What function they havearrow_forward
- Describe the molecular interactions that a cell uses to migrate through extracellular matrix. (use the key terms : actin, integrin, fibronectin)arrow_forwardList the steps of collagen assembly and include the location of each steparrow_forwardcan microtubule replace actin filament?why or why not?arrow_forward
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