IA MODIFIED MASTERING BIOLOGY WITH E TEX
12th Edition
ISBN: 9780136781752
Author: Urry
Publisher: PEARSON
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Chapter 7, Problem 2TYU
According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly
- (A) spread in a continuous layer over the inner and outer surfaces of the membrane.
- (B) confined to the hydrophobic interior of the membrane.
- (C) embedded in a lipid bilayer.
- (D) randomly oriented in the membrane, with no fixed inside-outside polarity.
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Students have asked these similar questions
According to the fluid mosaic model of membrane structure,proteins of the membrane are mostly(A) spread in a continuous layer over the inner and outersurfaces of the membrane.(B) confined to the hydrophobic interior of the membrane.(C) embedded in a lipid bilayer.(D) randomly oriented in the membrane, with no fixed insideoutside polarity.
Which of the following statements is true of membrane proteins?
a) They are suspended on the surface of the membrane.
b) They are partly embedded in the bilayer
c) They span across the bilayer and project from both sides
d) Any of these are true, depending on the specific membrane protein.
3)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability.
A)phospholipids
b) steroid hormones
c) Cholesterol
4)Which one of the following influences the rate at which diffusion can occur?
Size of the concentration gradient
Mass of the molecule
Distance
All of the above affect diffusion
None of the above affect the diffusion rate
Chapter 7 Solutions
IA MODIFIED MASTERING BIOLOGY WITH E TEX
Ch. 7.1 - VISUAL SKILLS Carbohydrates are attached to...Ch. 7.1 - Prob. 2CCCh. 7.2 - What property allows O2 and CO2 to cross a lipid...Ch. 7.2 - VISUAL SKILLS Examine Figure 7.2. Why is a...Ch. 7.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 7.3 - Prob. 1CCCh. 7.3 - WHAT IF? If a Paramecium swims from a hypotonic...Ch. 7.4 - Prob. 1CCCh. 7.4 - Prob. 2CCCh. 7.4 - MAKE CONNECTIONS Review the characteristics of...
Ch. 7.5 - As a cell grows, its plasma membrane expands. Does...Ch. 7.5 - DRAW IT Return to Figure 7.9, and circle a patch...Ch. 7.5 - Prob. 3CCCh. 7 - In what ways are membranes crucial to life?Ch. 7 - How do aquaporins affect the permeability of a...Ch. 7 - What happens to a cell placed in a hypertonic...Ch. 7 - ATP is not directly involved in the functioning of...Ch. 7 - Which type of endocytosis involves the binding of...Ch. 7 - In what way do the membranes of a eukaryotic Cell...Ch. 7 - According to the fluid mosaic model of membrane...Ch. 7 - Which of the following factors would tend to...Ch. 7 - Which of the following processes includes all the...Ch. 7 - Prob. 5TYUCh. 7 - DRAW IT An artificial "cell" consisting of an...Ch. 7 - EVOLUTION CONNECTION Paramecium and other...Ch. 7 - Prob. 8TYUCh. 7 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 7 - WRITE ABOUT A THEME: INTERACTIONS A human...Ch. 7 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Why is it advantageous for the cell membrane to be fluid in nature?arrow_forwarda) What are the forces that maintain structural integrity of biological membranes?b) Explain how each force mentioned is formed in membrane lipids. c) Comment on lipid to protein ratio in the membrane of molecules that transport insoluble substances in the blood.arrow_forwardWhich statements are consistent with the fluid-mosaic model of membranes? (a) All membrane proteins are bound to the interior of the membrane. (b) Both proteins and lipids undergo transverse (flip-flop) diffusion from the inside to the outside of the membrane. (c) Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane. (d) Carbohydrates are covalently bonded to the outside of the membrane. (e) The term mosaic refers to the arrangement of the lipids alone.arrow_forward
- 27. Ions cannot cross directly through a lipid bilayer, yet we know they travel in and out of cells. Which of the following is/are true about how ions diffuse cross membranes? a) They diffuse down their concentration gradients. b) They diffuse through channels formed by integral membrane proteins. c) They diffuse down their electrical gradients. d) a and c e) a, b and carrow_forwardAll of the following are passive membrane transport processes except: (a) diffusion. (b) facilitated diffusion. (c) vesicular transport. (d) osmosis.arrow_forwardProteins which are only on one side of the plasma membrane and may not interact with the phospholipids directly. The proteins are often involved in intracellular signialing. a) cholesterol b) peripheral protein c) integral proteins D) glycolipidarrow_forward
- Factors that affect the rate of diffusion through a membrane include all of the following EXCEPT: a)membrane surface area. b) molecular weight. c) availability of energy. d) steepness of concentration gradient.arrow_forward1)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)Triglycerdies B) Steriod hormones c) cholesterol 2) In _______________, a single substrate/solute move from a high concentration area to a lower concentration are without the aid of any additional molecules. A) Diffusion B)Facilitated diffusion C) Cotransport 3)Channel proteins require a confirmational change in order to properly function. A) Hydrophilic B) ionic C) Polararrow_forwardAmong the statements a, b and c, which is/are false? a) Endocytosis is the formation of vacuoles by the plasma membrane for the purpose oftransport inside the cell a small content of extracellular fluid. b) Exocytosis is the formation of vacuoles by the plasma membrane for the purpose oftransport a small amount of intracellular fluid out of the cell. c) Pinocytosis is a form of endocytosis. d) All of these statements are false. e) None of these statements is false.arrow_forward
- Which of the following components of the plasma membrane will help increase fluidity of the memebrane? a) cholesterol b) channel proteins c) phospholipid d) glycoproarrow_forward10(a) Draw or explain the structure of the plasma membrane, 10(b) explain how the plasma membrane is able to be selectively permeable 10(c) How do small, lipid-based molecules move through the membrane? 10(d) How do large or polar molecules move through the membrane?arrow_forwardWhich of the following statements is (are) consistent with what is known about membranes? (a) A membrane consists of a layer of proteins sandwiched between two layers of lipids. (b) The compositions of the inner and outer lipid layers are the same in any individual membrane. (c) Membranes contain glycolipids and glycoproteins. (d) Lipid bilayers are an important component of membranes. (e) Covalent bonding takes place between lipids and proteins in most membranes.arrow_forward
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