Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 10.2, Problem 1EQ
Summary Introduction
To determine: The purpose of the study conducted by Loewenstein and colleagues.
Introduction: In a multicellular organism, cells are linked to each other by specialized structures called cell junctions. Animal cells have a more varied group of cell junctions than plant cells, as they lack a cell wall. Three types of junctions found between cells in animals are anchoring junctions, tight junctions and gap junctions.
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In 1970, Frye and Edidin published research describing the mobility of plasma membrane proteins. They fused mouse and human
cells together, creating a hybrid cell, and then examined the localization of mouse and human proteins over time. Initially mouse
and human proteins were each restricted to one-half of the heterokaryon, but over time the mouse and human proteins mixed,
with each being present over the entire cell surface. What technique did Frye and Edidin likely use to examine the mouse and
human proteins?
Choose one:
O A. interference contrast light microscopy
B. transmission electron microscopy
O C. fluorescence microscopy
O D. scanning electron microscopy
Measure the length of Cell X using the ruler in Microsoft Word. Assuming the actual length to be 3 um, calculate the magnification. Show your complete solution.
Based on Figure 1, what internal organization can be distinguished in cell X? Why?
Based in Figure 1, can you see a limiting membrane? Can you deduce its presence? Why or why not?
The following image is based on real results from an influential experiment in cell biology. This experiment studied the role of the proteins Ran and importin in nuclear protein transport. The experiment used flourescently-labeled proteins containing a nuclear localization sequence (the "substrate"). Ran, importin, and GTP were either present or absent, as indicated in the figure. Cells were exposed to these different conditions and then analyzed by fluorescence microscopy.
Circles are the cells' nuclei. Very light circles are the nuclei without the substrate attached.
Study the figure below and then answer the questions that follow.
1. What actions does Ran perform by itself?
2. What actions does importin perform by itself?
3. How do Ran and importin act together in the nuclear import of protein?
4. Why is GTP required?
Chapter 10 Solutions
Biology
Ch. 10.1 - What are the four functions of the ECM in animals?Ch. 10.1 - Prob. 2CCCh. 10.1 - Prob. 3CCCh. 10.1 - What structural feature of GAGs gives the ECM a...Ch. 10.1 - Prob. 1CSCh. 10.2 - Prob. 1CCCh. 10.2 - Prob. 1CSCh. 10.2 - Prob. 2CCCh. 10.2 - Prob. 1EQCh. 10.2 - Cell Junctions CoreSKILL Explain the experimental...
Ch. 10.2 - Prob. 3EQCh. 10.2 - Prob. 3CCCh. 10.2 - Prob. 2CSCh. 10.3 - Tissues Concept Check: Which of the four general...Ch. 10.3 - Prob. 2CCCh. 10 - The function of the extracellular matrix (ECM) in...Ch. 10 - Prob. 2TYCh. 10 - The polysaccharide that form the hard outer...Ch. 10 - Prob. 4TYCh. 10 - Prob. 5TYCh. 10 - Prob. 6TYCh. 10 - Prob. 7TYCh. 10 - Prob. 8TYCh. 10 - A type of tissue that is rich in ECM or has cells...Ch. 10 - Which of the following is not a correct statement...Ch. 10 - Prob. 1CQCh. 10 - Prob. 2CQCh. 10 - Core Concept: Systems We can view the body of a...Ch. 10 - Discuss the similarities and differences between...Ch. 10 - Discuss the similarities and differences between...
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