1 SEM CARDLESS ACC W/RAVEN TEXT
12th Edition
ISBN: 9781265321062
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 5, Problem 1A
A bacterial cell that can alter the composition of saturated and unsaturated fatty acids in its membrane lipids is adapted to a cold environment. If this cell is shifted to a warmer environment, it will react by
a. increasing the amount of cholesterol in its membrane.
b. altering the amount of protein present in the membrane.
c. increasing the degree of saturated fatty acids in its membrane.
d. increasing the percentage of unsaturated fatty acids in its membrane.
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Check out a sample textbook solutionStudents have asked these similar questions
Cells need to be buffered because
A. they need to be able to increase or decrease their cytosolic pH to adapt to various environmental conditions.
B. their proteins work best at low pH.
C. they need to maintain a specific cytosolic pH to keep biomolecules from being ionized.
D. they need to maintain a specific cytosolic pH to keep biomolecules at their optimal ionic state.
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.
3) For each case given below, describe how the fluidity of membranes will change (increase or decrease) and why this change
will happen.
A. Increasing the number of double bonds (unsaturation) of the fatty acids in the phospholipids.
B. Increasing the length of the fatty acid chains.
C. Increasing the cholesterol content of the membrane
D. Increasing temperature
Chapter 5 Solutions
1 SEM CARDLESS ACC W/RAVEN TEXT
Ch. 5.1 - Prob. 1LOCh. 5.1 - Explain the fluid mosaic model of membrane...Ch. 5.2 - List the different components of phospholipids.Ch. 5.2 - Prob. 2LOCh. 5.2 - Prob. 3LOCh. 5.3 - Illustrate the functions of membrane proteins.Ch. 5.3 - Prob. 2LOCh. 5.3 - Prob. 3LOCh. 5.4 - Compare simple diffusion and facilitated...Ch. 5.4 - Prob. 2LO
Ch. 5.4 - Prob. 3LOCh. 5.5 - Prob. 1LOCh. 5.5 - Prob. 2LOCh. 5.5 - Prob. 3LOCh. 5.6 - Distinguish between endocytosis and exocytosis.Ch. 5.6 - Illustrate how endocytosis can be specific.Ch. 5 - According to the fluid mosaic model, membranes are...Ch. 5 - Prob. 2IQCh. 5 - The fluid mosaic model of the membrane describes...Ch. 5 - What chemical property characterizes the interior...Ch. 5 - The transmembrane domain of an integral membrane...Ch. 5 - The specific function of a membrane within a cell...Ch. 5 - The movement of water across a membrane is...Ch. 5 - Prob. 6UCh. 5 - Which of the following is NOT a mechanism for...Ch. 5 - A bacterial cell that can alter the composition of...Ch. 5 - What variable(s) influence(s) whether a nonpolar...Ch. 5 - Which of the following does NOT contribute to the...Ch. 5 - How are active transport and coupled transport...Ch. 5 - A cell can use the process of facilitated...Ch. 5 - figure 5.5 describes a classic experiment...Ch. 5 - Each compartment of the endomembrane system of a...Ch. 5 - The distribution of lipids in the ER membrane is...
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- Which of the following statements is CORRECT about the fatty acid residues in membrane lipids? A. Whole swathes of the membrane have higher saturated residues to increase the overall surface tension. B. There are more unsaturated units to maintain the fluidity of the structure at all environmental temperatures. C. More unsaturated residues are present to increase the melting point of the membrane making it resilient. D. Larger quantities of saturated units are present to maximize stacking and provide effective barrier capacity.arrow_forwardWhich of the following statements is correct? A. Short-chain fatty acids have higher transition temperatures than do long-chain fatty acids making membranes enriched in shor chain fatty acids less fluid. B. Long-chain fatty acids have higher transition temperatures than do short-chain fatty acids making membranes enriched in long chain fatty acids more fluid. C. Long-chain fatty acids have higher transition temperatures than do short-chain fatty acids making membranes enriched in long- chain fatty acids less fluid D. Short-chain fatty acids have higher transition temperatures than do long-chain fatty acids making membranes enriched in short- chain fatty acids more fluid. B OD OC OA O All are incorrectarrow_forwardThe presence of cholesterol regulates the in animal cells. Ca. fluidity of a membrane b. polarity of a membrane c. structure of a membranearrow_forward
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- Integral proteins associate with the membrane through A. covalent attachment to lipids. B. covalent attachment to lipid anchors such as palmitoyl groups. C. hydrophobic interactions with lipids. D. interactions with carbohydrates attached to lipids.arrow_forwardWhat is the role of cholesterol in animal cell membranes? A. Blocks the association of the fatty acyl chains of phospholipids at high temperature. B. Is a receptor site for hormones on the surface of membranes. C. Broadens the temperature range of optimum membrane fluidity. D. Aids in the transport of small hydrophobic molecules across the membrane. A fatty acid designated as 20:0 is ________, while one that is designated 20:3 delta ^5,8,11 is ________. A. complex; simple B. unsaturated; saturated C. saturated; unsaturated D. simple; complex E. monounsaturated; polyunsaturatedarrow_forwardCO2 can cross the plasma membrane by diffusion. If a cell is in the process of metabolizing glucose, which direction would diffusion tend to carry CO2 molecules? (It may help to consider: where is CO2 highly concentrated? Would diffusion carry CO2 toward or away from this location? Group of answer choices A. From inside the cell to outside the cell B. From outside the cell to inside the cell C. not enough info to tellarrow_forward
- Which of the following is true about the phosphorylation of proteins? A. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains. B. Phosphorylation of proteins is catalyzed by phosphatases. C. Phosphoryation always activates enzymes. D. The specificity in phosphorylation is conferred solely by the amino acid to be phosphorylated.arrow_forwardLiver cells in culture were kept at 0°C and treated with trypsin to digest the receptors on the cell surface. The temperature was then raised to 37°C and radioactive LDL was added to the culture media. Several hours later, the labeled LDL was found to be inside the cells. This specific process of LDL uptake is A. active transport B. facilitated diffusion C. phagocytosis D. pinocytosis E. receptor-mediated endocytosisarrow_forwardWhich of the following is not a function of a protein? A. Support B. Transport C. Metabolic regulation D. Storage of genetic information E. Movementarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license