Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 5.1, Problem 2C
Summary Introduction
To draw: A simple sketch to illustrate how a transmembrane protein might be positioned in a lipid bilayer.
Concept introduction: Membrane proteins are a part of biological membrane that primarily interacts with it to perform various functions in the cell. There are various membrane proteins that help in the transportation of molecules in and out of the cell. Based on extend of attachment to the membrane, the membrane proteins are classified as integral proteins, peripheral proteins, and transmembrane proteins.
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Drawn below is a schematic of a transmembrane protein.
Extracellular
Cell
membrane
Cytosolic side
(a) From the list below, select the amino acid(s) that might by more common in the extracellular domain of
this membrane protein and whose side- chain can form hydrogen bonds with the surrounding water
molecules. Explain why you selected this option(s).
Lysine
Serine
Phenylalanine
Methionine
(b) From the list below, select the amino acid(s) that would likely be found in the transmembrane/
membrane spanning domain of this protein and whose side- chain interacts with the lipid bilayer.
Lysine
Serine
Phenylalanine
Methionine
Discuss membrane proteins and their integration in the lipid bilayer.
Read This!
When phospholipids are added to an aqueous environment (consisting mostly of water) the
phospholipid molecules will spontaneously assemble into a phospholipid bilayer where the layers are
held together by weak attractive forces between molecules. These structures are often seen in nature as
cell and organelle membranes.
12. Consider animal cells, which are only bound by a cell membrane and plant cells which are bound
by both a cell membrane and a cell wall. Are cell membranes flexible (fluid)? Provide specific
examples to support your answer.
13. Explain why a phospholipid bilayer is flexible. terms of the strength of the forces that hold
it together.
14. Refer to Model 1.
a. What happens to the shape of the hydrophobic tail in a phospholipid when a double bond
is present in the carbon chain?
b. Explain why the flexibility (fluidity) of a membrane increases when more of the
phospholipids in the layers contain double bonds.
15. The diagram below shows the chemical structure…
Chapter 5 Solutions
Biology (MindTap Course List)
Ch. 5.1 - Prob. 1LOCh. 5.1 - Prob. 2LOCh. 5.1 - Prob. 3LOCh. 5.1 - Prob. 4LOCh. 5.1 - What molecules are responsible for the physical...Ch. 5.1 - Prob. 2CCh. 5.1 - Prob. 3CCh. 5.2 - Prob. 5LOCh. 5.2 - Prob. 1CCh. 5.2 - What roles do membrane proteins play in cell...
Ch. 5.3 - Describe the importance of selectively permeable...Ch. 5.3 - Prob. 1CCh. 5.3 - Prob. 2CCh. 5.3 - Prob. 3CCh. 5.4 - Prob. 7LOCh. 5.4 - LEARNING O9BJECTIVES 8Define osmosis and solve...Ch. 5.4 - PREDICT What would happen if a plan cell were...Ch. 5.4 - What is the immediate source of energy for simple...Ch. 5.4 - Prob. 3CCh. 5.5 - Prob. 9LOCh. 5.5 - Prob. 1CCh. 5.5 - What is the immediate energy source for...Ch. 5.6 - Prob. 10LOCh. 5.6 - In what ways are exocytosis and endocytosis...Ch. 5.6 - How are the processes of phagocytosis and...Ch. 5.6 - What is the sequence of events in...Ch. 5.7 - Compare the structures and functions of anchoring...Ch. 5.7 - Prob. 1CCh. 5.7 - Prob. 2CCh. 5 - Test Your Understanding 1.Transmembrane proteins...Ch. 5 - Test Your Understanding 2.Which of the following...Ch. 5 - Test Your Understanding 3.ABC transporters (a) use...Ch. 5 - Test Your Understanding 4.When plant cells are in...Ch. 5 - Test Your Understanding 5.Which of the following...Ch. 5 - Test Your Understanding 6.Electrochemical...Ch. 5 - Test Your Understanding 7.In cotransport (indirect...Ch. 5 - Prob. 8TYUCh. 5 - Prob. 9TYUCh. 5 - Test Your Understanding 10.INTERPRET DATA GLUT 4...Ch. 5 - Prob. 11TYUCh. 5 - Test Your Understanding 12.EVOLUTION LINK Explain...Ch. 5 - Prob. 13TYU
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