CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Textbook Question
Chapter 5, Problem 2TYU
Which of the following factors would tend to increase membrane fluidity?
- A. a greater proportion of unsaturated phospholipids
- B. a greater proportion of saturated phospholipids
- C. a lower temperature
- D. a relatively high protein content in the membrane
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Which of the following statements regarding the selective permeability of the lipid bilayer is FALSE?
A. the permeability of the lipid bilayer to different substances varies.
B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen.
C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers permeability to that substance.
D. The lipid bilayer component of the plasma membrane is moderately permeable to ions and large, uncharged polar molecules
Which of the following is NOT a function of membrane proteins?
a.Regulate the passage of ions
b.Act as carrier molecules for various solutes
c.Act as anchors or stabilizers for the cell membrane
d.Storage of cellular nutrients
which of the following statements is correct about the movement of water across a plasma membrane
a. it cannot pass through any ion channels
b. it moves through the membrane via mediated transport
c. even though it a polar molecule, it moves readily through the nonpolar lipid bilayer
d. artificial lipid membranes are impermeable to water
Chapter 5 Solutions
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
Ch. 5.1 - Plasma membrane proteins have carbohydrates...Ch. 5.1 - WHAT IF? How would the membrane lipid composition...Ch. 5.2 - What property allows O2 and CO2, to cross a lipid...Ch. 5.2 - Why is a transport protein needed to move many...Ch. 5.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 5.3 - How do you think a cell performing cellular...Ch. 5.3 - WHAT IF? If a Paramecium caudatum cell swims from...Ch. 5.4 - Sodium-potassium pumps help nerve cells establish...Ch. 5.4 - Prob. 2CCCh. 5.4 - MAKE CONNECTIONS Review the characteristics of the...
Ch. 5.5 - As a cell grows, its plasma membrane expands. Does...Ch. 5.5 - Prob. 2CCCh. 5.5 - MAKE CONNECTIONS In Concept 4.7, you learned that...Ch. 5.6 - During an epinephrine-initiated signal in liver...Ch. 5.6 - When a signal transduction pathway involves a...Ch. 5.6 - WHAT IF? How can a target cells response to a...Ch. 5 - In what way do the membranes of a eukaryotic cell...Ch. 5 - Which of the following factors would tend to...Ch. 5 - Phosphorylation cascades involving a series of...Ch. 5 - Lipid-soluble signaling molecules, such as...Ch. 5 - Which of the following processes includes all the...Ch. 5 - Based on Figure 5.17.which of these experimental...Ch. 5 - Prob. 7TYUCh. 5 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 5 - FOCUS ON EVOLUTION Paramecium and other...Ch. 5 - FOCUS ON INTERACTIONS A human pancreatic cell...Ch. 5 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- For the following modes of transport for membranes, tell whether the flow is with or against chemical potenial. Meaning +deltaG or -deltag A. Passive Diffusion B.Faciliated Diffusion C.Active Transportarrow_forwardChoose among the following the two properties of a particle influence whether it can permeate the plasma membrane? A. lipid solubility of the particle B. particle mass C. particle size D. water solubility of the particle E. particle color F. particle weightarrow_forwardWhat variable(s) influence(s) whether a nonpolar molecule can move across a membrane by passive diffusion? a. The structure of the phospholipids bilayer b. The difference in concentration of the molecule across the membrane c. The presence of transport proteins in the membrane d. All of the choices are correct.arrow_forward
- Membrane proteins perform the following functions EXCEPT one. Which One? A. form the glycocalyx B. act as receptor proteins C. form pores to allow the passage of small solutes D. behave as enzymes.arrow_forwardwhich one of the following diffuses more readily through the lipid bilayer of a plasma membrane a. polar molecules b. non polar molecules c. ionized molecules d. waterarrow_forwardThe process of “active transport" through a membrane may be described by which of the following? A. the movement of ions and small molecules away from regions where they are in high concentration. B. the use of energy from ATP to move ions and small molecules into regions where they are in lower concentration. C. the plasma membrane engulfs the substance and moves it through the membrane. D. the use of energy from ATP to move ions and small molecules against their concentration gradient.arrow_forward
- Indicate whether the following statements are true or false. If a statement is false, explain why it is false. a. All types of cells contain cell walls, but only some cell types possess plasma membranes. b. The distribution of specific lipids to the inner and outer leaflet is asymmetrical, or biased, in plasma membranes. C. Lateral diffusion is the movement of lipids from one layer of the membrane to the other. d. Fatty acids tails are used to embed integral, transmembrane proteins in the plasma membrane.arrow_forwardOsmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement? A. Exact concentration of solution is not given B. Character of semi permeable membrane is not given C. The flow of solution is not possible through semi permeable membrane D. All are incorrectarrow_forwardDescribe the properties of the three classes of membrane proteins (integral, peripheral, and lipid-anchored) along: A. differences from each other B. variation among themselvesarrow_forward
- Passive membrane transport processes include... a.movement of water from an area of high solute concentration to an area of low concentration b.consumption of ATP c.the use of transport proteins when moving substances from areas of low to high concentration d.movement of a substance down its concentration gradientarrow_forwardThe fluidity of the plasma membrane increases with 1.Increase in unsaturated fatty acids in the membrane 2.Increase in saturated fatty acids in the membrane 3.Increase in glycolipid content in the membrane 4.Increase in phospholipid content in the membranearrow_forwardWhich of the following does not apply to lipid asymmetry? a.It arises in the endoplasmic reticulum. b.It arises due to the flip-flop movement of specific phospholipids to the cytosolic monolayer. c.It is preserved throughout vesicular transport. d.It depends on the activity of flippase.arrow_forward
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