Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 15, Problem 15.1PS
Beyond the Membrane: ECM and Cell Walls. Compare and contrast the extracellular matrix (ECM) of animal cells with the walls around plant cells.
(a) What basic organizational principle underlies both ECM and cell walls?
(b) What are the chemical constituents in each case?
(c) What functional roles do the ECM and cell wall have in common?
(d) What functional roles are unique to the ECM? To the cell wall?
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Cell Membrane and Cell Transport WebQuest
Part I: Cell Membranes
Go to the following website: www.biology4kids.com/ files/cell_membrane.html
1. How is the cell membrane similar to a plastic bag with tiny holes?
2. What two components make up the cell membrane?
a. What are their functions?
3. What is the fluid mosaic model?
4. Sketch a section of the cell membrane, showing both phospholipids and proteins.
Label your drawing.
5. Label the diagram of the phospholipid molecule below with the following terms:
hydrophilic head, hydrophobic tail
This diagram
shows a
Head
simplified
version of a
phospholipid
molecule.
Tails
Name the three major assumptions made by the "Cell theory".
(i)
The lipid membrane is composed of lipid molecules. Explain the principle of
membrane formation highlighting the role of the physical properties of the
lipids.
(ii)
Comparing dimensions and length scales is often a first step in an analysis.
Give an approximate value for the thickness of a lipid bilayer and the linear
length of a helical turn of a DNA double helix.
A technician wants to amplify DNA from a patient sample. However, the lab is not
equipped with a thermocycler.
(i)
(ii)
Name two methods for DNA amplification that can be operated at constant
temperature and give their acronyms.
Explain these two methods in detail using a schematic and name all necessary
components that are required to perform the amplification.
Describe the main function of the middle ear. Highlight the role of the ossicles and
the tympanic membrane.
Chapter 15 Solutions
Becker's World of the Cell (9th Edition)
Ch. 15 - What are the two main types of cell-cell adhesive...Ch. 15 - Cells behave differently from those shown in...Ch. 15 - Prob. 15.2CCCh. 15 - Prob. 15.3CCCh. 15 - Beyond the Membrane: ECM and Cell Walls. Compare...Ch. 15 - Problem Set Anchoring Cells to the ECM. Animal...Ch. 15 - Prob. 15.3PSCh. 15 - Compaction. In mammalian embryos such as the...Ch. 15 - Cellular Junctions and Plasmodesmata. Indicate...Ch. 15 - Junction Proteins. Indicate whether each of the...
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