Eukaryotic membrane fluidity can be decreased by which of the following mechanisms? increasing the degree of saturation in the fatty acids of membrane lipids decreasing the number of fatty acids attached to glycerol in membrane lipids decreasing the number of carbons in the fatty acids of membrane lipids increasing the number of branched chain fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell

Eukaryotic membrane fluidity can be decreased by which of the following mechanisms? increasing the degree of saturation in the fatty acids of membrane lipids decreasing the number of fatty acids attached to glycerol in membrane lipids decreasing the number of carbons in the fatty acids of membrane lipids increasing the number of branched chain fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 11RQ: The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a....

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Eukaryotic membrane fluidity can be increased by which of the following mechanisms? increasing the number of fatty acids attached to glycerol in membrane lipids decreasing the number of branched chain fatty acids of membrane lipids decreasing the number of carbons in the fatty acids of membrane lipids decreasing the number of membraned organelles in the eukaryotic cell increasing the degree of saturation in the fatty acids of membrane lipids
Eukaryotic membrane fluidity can be increased by which of the following mechanisms? increasing the number of carbons in the fatty acids of membrane lipids increasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of straight-chain fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell
Eukaryotic membrane fluidity can be decreased by which of the following mechanisms? decreasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of carbons in the fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids decreasing the number of membraned organelles in the eukaryotic cell increasing the number of branched-chain fatty acids of membrane lipids
Eukaryotic membrane fluidity can be increased by which of the following mechanisms? cell bio increasing the number of carbons in the fatty acids of membrane lipids increasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of straight-chain fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell
Which of the following lipid components of the eukaryotic plasma membrane would be associated with the highest membrane fluidity? a triglyceride with unbranched, saturated, short-chain fatty acids a monoglyceride with unbranched, saturated, short-chain fatty acids a triglyceride with unbranched, saturated, long-chain fatty acids a monoglyceride with branched, unsaturated, short-chain fatty acids a diglyceride with unbranched, saturated, long-chain fatty acids
Which of the following factors would tend to increase membrane fluidity? A greater proportion of unsaturated phospholipids A relatively high protein content in the membrane A greater proportion of saturated phospholipids A lower temperature
The 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 membrane
Draw and label a cell lipid bilayer and diagram how the following transport processes take place: passive diffusion of oxygen into the cell, facilitated diffusion of potassium into the cell, active transport of sucrose into the cell. Using different symbols (circles for oxygen, squares for sucrose, and triangles for potassium ions), show the relative concentrations (gradients) of these substances on the inside and outside of the cell. For example, to show that oxygen enters the cell by going “down” its gradient, you would draw more circles on the outside of the cell than inside the cell. Be sure to show and label membrane proteins when appropriate, and show the electric membrane potential using “+”s (pluses) on one side and “-”s (minuses) on the other side of the membrane. Also show the proton pump which uses ATP as a source of energy.
Which of the following molecules would you expect to diffuse through the lipid bilayer of a plasma membrane most rapidly? Na+ An amino acid Starch Glucose O2
A transmembrane protein has the following properties: it has two binding sites, one for solute A and one for solute b. The protein can undergo a conformational change to switch between two states: either both binding sites are exposed exclusively on one side of the membrane or both binding sites are exposed exclusively on the other side of the membrane. The protein can switch between the two conformational states only if both binding sites are occupied or if both binding sites are empty, but cannot switch if only one binding site is occupied. Do you need to specify any additional properties to turn this protein into a symport that couples the movement of solute A up its concentration gradient to the movement of solute b down its electrochemical gradient?
A transmembrane protein has the following properties: it has two binding sites, one for solute A and one for solute b. The protein can undergo a conformational change to switch between two states: either both binding sites are exposed exclusively on one side of the membrane or both binding sites are exposed exclusively on the other side of the membrane. The protein can switch between the two conformational states only if both binding sites are occupied or if both binding sites are empty, but cannot switch if only one binding site is occupied. What kind of protein do these properties define?
Which of the following statements about a typical plasma membrane is correct? The hydrophilic interior of the membrane is composed primarily of the fatty acid tails of the phospholipids. Carbohydrates on the membrane surface are important in determing the overall bilayer structure. Phospholipids are the primary component that determines which solute can cross the plasma membrane. The two sides of the plasma membrane have different lipid and protein composition. The plasma membrane is covalently linked network of phospholipids and proteins that controls the movement of solutes into and out of a cell.