Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 3, Problem 7A
The spontaneous formation of a lipid bilayer in an aqueous environment occurs because
a. the polar head groups of the phospholipids can interact with water.
b. the long fatty acid tails of the phospholipids can interact with water.
c. the fatty acid tails of the phospholipids are hydrophobic.
d. Both a and c are correct.
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Students have asked these similar questions
What properties define the phospholipids that make up the lipid bilayer? Select all that apply.
A. Nonpolar, hydrophobic hydrocarbon tails
B. Polar, hydrophilic phosphate heads
C. Nonpolar, hydrophobic phosphate heads
D. Polar, hydrophilic hydrocarbon tails
Why do phospholipids tend to spontaneously orient themselves into something resembling a membrane such as the lipid-bilayer sphere, single-layer lipid sphere, and lipid-bilayer sheet?
a. Phospholipids are amphipathic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails.
b. Phospholipids are lipophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails
c. Phospholipids are amphipathic molecules. The nonpolar head faces towards other fatty acid tails and the polar fatty acid tails face towards water.
d. Phospholipids are hydrophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails.
Define the following terms: a. lipid bilayer b. fluid mosaic model c. membrane fluidity d. flippase e. floppase
Chapter 3 Solutions
Biology
Ch. 3 - Prob. 1UCh. 3 - Why are carbohydrates important molecules for...Ch. 3 - Plant cells store energy in the form of ______,...Ch. 3 - Prob. 4UCh. 3 - A molecule of DNA or RNA is a polymer of a....Ch. 3 - Prob. 6UCh. 3 - What monomers make up a protein? a....Ch. 3 - A triglyceride is a form of _______ composed of...Ch. 3 - You can use starch or glycogen as an energy...Ch. 3 - Which of the following is NOT a difference between...
Ch. 3 - Prob. 3ACh. 3 - A mutation that alters a single amino acid within...Ch. 3 - Two different proteins have the same domain in...Ch. 3 - What aspect of triglyceride structure accounts for...Ch. 3 - The spontaneous formation of a lipid bilayer in an...Ch. 3 - Prob. 1SCh. 3 - Hydrogen bonds and hydrophobic interactions each...Ch. 3 - Prob. 3S
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- The structure of a lipid bilayer is determined by the particular properties of its lipid molecules. What would happen if A. Phospholipids had only one hydrocarbon tail instead of two?B. The hydrocarbon tails were shorter than normal, say, about 10 carbon atoms long?C. All of the hydrocarbon tails were saturated?D. All of the hydrocarbon tails were unsaturated?E. The bilayer contained a mixture of two kinds of phospholipid molecules, one with two saturated hydrocarbon tails and the other with two unsaturated hydrocarbon tails?F. Each phospholipid molecule were covalently linked through the end carbon atom of one of its hydrocarbon tails to a phospholipid tail in the opposite monolayer?arrow_forwardIn addition to phospholipids, eukaryotic membranes also contain sterols of various kinds. What's the role of these sterols a. Sterols increase membrane strength b. They function in attaching the membrane to outer layers c. They function in signaling d. They have no function that is critical for eukaryotic cellsarrow_forwardWhich of the following is incorrect regarding phospholipids?a. The heads are polar.b. The tails are nonpolar.c. They contain a phosphate group in place of one fatty acid.d. They are energy-storage molecules in the cell.arrow_forward
- Define the following terms:a. lipid bilayerb. polar head groupc. hydrocarbon taild. integral proteine. peripheral proteinarrow_forwardWhich of the following best describes the lipid aggregates known as liposomes? A. They contain a hollow non-aqueous interior cavity. B. They are spherical structures with their hydrophobic regions aggregated in the interior cavity. C. They form because the cross-sectional area of the head group is greater than that of the acyl side chain(s). D. They are derived from a bilayer sheet.arrow_forwardDecide whether each of the following molecules will pass through a lipid bilayer. If the molecule will pass through, type yes it will. If the molecule will not pass through, type no it will not. a. Glucose b. Glycerol C.water D. Oxygen gasarrow_forward
- Which of the following statements about binding between cytosolic proteins and phospholipids is true? a. Phospholipids do not possess the appropriate features to bind to cytosolic proteins. b. Binding between cytosolic proteins and phospholipids is non-specific and does not require molecular complimentarity. c. The ability of a cytosolic protein and a phospholipid to bind can be changed by phosphrylation of the phospholipid. For example, different phosphoinositides bind to different cytosolic proteins. d. Phospohorylation of phosphoinositides occurs randomly, whereas protein phosphorylation is mediated by kinases and phosphotases. Please answer asap and type your answer and do not copy from anywhere please answer asaparrow_forwardDraw a sketch of a lipid bilayer, the structure that forms when a lipid such as phosphatidyl serine is dissolved in water.arrow_forwardcannot diffuse across a lipid bilayer. a. Water molecules b. Gases c. lons d. Nonpolar moleculesarrow_forward
- Which of the following molecules is not capable of forming lipid bilayers? a. glycolipids b. wax esters c. phospholipids d. cerebrosidesarrow_forwardWhich of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to decrease that membrane’s fluidity? A. linolenic acid, with 18 carbons and three carbon-to-carbon double bonds B. linoleic acid, with 18 carbons and two carbon-to-carbon double bonds C. oleic acid, with 18 carbons and one carbon-to-carbon double bond D. stearic acid, with 18 carbons and no carbon-to-carbon double bonds E. all of the above molecules are saturated, and equally likely to decrease membrane fluidityarrow_forwardExplain how the lipid bilayer modulate the activity of proteins. Give 2 examples.arrow_forward
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