BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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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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Students 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.
Why is it important that glucose be converted to glucose-6-phosphate once glucose enters a cell?
Select one:
a. This form is easier for cells to metabolize.
b. The cells can easily excrete this molecule.
c. Glucose can't diffuse out of the cell if it is in this form.
d. It can now cross the plasma membrane.
e. It becomes a long-term storage molecule for glucose.
Chapter 5 Solutions
BIOLOGY
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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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
- Which 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_forwardAlice reads another paper which seeks to elucidate the interaction of GLUT1, LAT1 and the movement of water. In the paper, the authors set up artificial cells which mimic the endothelial cells. Embedded in the artificial cell membrane is a deformed GLUT1 protein which does not work, a normal LAT1 protein and aquaporins. The artificial cell is submerged in a beaker of water which contains 10 picomole of phenylalanine. After several minutes where will water move? a) Water will move out of the artificial cell. b) Most of the water will move out of artificial cell. A little will move in. c) Water will move into the artificial cell. d) Most of the water will move into the artificial cell. A little will move out.arrow_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
- Glucose can be transported into cells with a glucose/sodium symporter. If the extracellular concentration of sodium is always in excess to that of glucose, which of these manipulations would MOST increase the rate of glucose transport into a cell? A. increase in the extracellular concentration of sodium B. increase in the intracellular concentration of sodium C. increase in the extracellular concentration of glucose D. increase in the intracellular concentration of glucosearrow_forwardIntegral 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_forward
- Define the following terms:a. peripheral proteinb. integral proteinc. lipid raftd. passive transporte. active transportarrow_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_forwardMark the following statements about the plasma membrane as true or false. If a statement is false, correct it to make a true statement. a. _____ Integral membrane proteins generally span the width of the plasma membrane, whereas peripheral proteins are found on only one side of the membrane. b. _____ Cholesterol provides the plasma membrane with stability in the face of changing ion concentrations . c. _____ Membrane cholesterol is vitally important for cell-cell recognition. d. _____ Membrane proteins often function as channels or carriers. e. _____ The overall structure of the plasma membrane is a mosaic with the components locked tightly in placearrow_forward
- Which of the following could be a function of a membrane protein? Select one: a. Thermal insulation b. Oxygen uptake c. Enzymatic activity d. Energy storagearrow_forwardHow do small fat-soluble molecules normally get into a cell? a. they never get in b. the pass through specialized proteins in the cell membrane called aquaporins c. they bind to protein carriers d. they pass through membrane protein channels e. They dissolve in the hydrophobic components of the membrane and enter the cell by diffusionarrow_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_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license