he fatty acids below can be esterified to a glycerol molecule to form glycerophospholipids that, in turn, could aggregate to form a lipid bilayer. Arrange the fatty acids starting from which fatty acid will produce the east rigid bilayer going to the fatty acid that will produce the most rigid bilayer. 14:0 - 12:0 - 22:0 - 18:0 O 12:0 < 18:0 < 14:0 < 22:0 O 14:0 < 12:0 < 22:0 < 18:0 O 22:0 < 18:0 < 14:0 < 12:0 O 12:0 < 14:0 < 18:0 < 22:0

he fatty acids below can be esterified to a glycerol molecule to form glycerophospholipids that, in turn, could aggregate to form a lipid bilayer. Arrange the fatty acids starting from which fatty acid will produce the east rigid bilayer going to the fatty acid that will produce the most rigid bilayer. 14:0 - 12:0 - 22:0 - 18:0 O 12:0 < 18:0 < 14:0 < 22:0 O 14:0 < 12:0 < 22:0 < 18:0 O 22:0 < 18:0 < 14:0 < 12:0 O 12:0 < 14:0 < 18:0 < 22:0

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter3: Cell Structure

Section: Chapter Questions

Problem 8SQ: In a lipid bilayer, the of all the lipid molecules are sandwiched between all of the __________. a....

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Which of the following correctly describes how high levels of fatty acid structures contribute to the rigidity of the cell membrane? The cell membrane becomes more rigid as the amount of unsaturated fatty acids with a kinked structure increases. The cell membrane becomes more rigid as the amount of unsaturated fatty acids with a kinked structure increases. The cell membrane becomes more rigid as the amount of saturated fatty acids with a straight structure increases. The cell membrane becomes more rigid as the amount of saturated fatty acids with a straight structure increases. The cell membrane becomes less rigid as the amount of unsaturated fatty acids with a straight structure increases. , , The cell membrane becomes less rigid as the amount of unsaturated fatty acids with a straight structure increases. , , The cell membrane becomes less rigid as the amount of saturated fatty acids with a straight structure increases.
Which of the following statements are correct? Explain your answers. Lipids in a lipid bilayer spin rapidly around their long axis. Lipids in a lipid bilayer rapidly exchange positions with one another in their own monolayer. Lipids in a lipid bilayer do not flip-flop readily from one lipid monolayer to the other. Hydrogen bonds that form between lipid head groups and water molecules are continually broken and re-formed. Glycolipids move between different membrane-enclosed compartments during their synthesis but remain restricted to one side of the lipid bilayer. margarine contains more saturated lipids than the vegetable oil from which it is made. some membrane proteins are enzymes. The sugar layer that surrounds all cells makes cells more slippery.
Which of the following is not a lipid link that anchors membrane-associated proteins to the bilayer? Thioether-linked prenyl anchors. Ester-linked triacylglycerol anchors. Glycosyl phosphatidylinositol anchors. Thioester-linked fatty acyl anchors. Amide-linked myristoyl anchors.
Which of these general statements is TRUE about the lipid called phosphatidylcholine (or PC)? Group of answer choices PC is NOT an aminophospholipid. PC is zwitterionic at normal cell pH. PC resides mainly in the outer leaflet of the membrane bilayer. 3 of these 4 responses are correct PC is a type of cholesterol.
Draw a lipid bilayer containing any or all of the fatty acids in number one with the presence of Cholesterol and membrane proteins. Your lipid bilayer must contain at least 20 lipid units (including Cholesterol).
What substance joins proteoglycans together into gigantic complexes called proteoglycan aggregates? These complexes can occupy very large volumes. a. hyaluronidase b. hyaluronic acid c. proteoglycase d. fibronectin e. laminin
Decide 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 gas
Which 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 fluidity
Is the statement true? The individual glycerophospholipid molecules that aggregate become covalently linked to each other to form a lipid bilayer.
Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the plasma membrane faces outward on the external surface of the cell, all the carbohydrate on internal membranes faces toward the cytosol.] [Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane.]
Which 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.
Which of the following fatty acids, if incorporated into a typical eukaryotic membrane phospholipid, would be the most likely to increase that membrane's fluidity? arachidonic acid with 20 carbons and two carbon-to-carbon double bonds stearic acid, with 18 carbons and no carbon-to-carbon double bonds None of the above arachidonic acid with 20 carbons and three carbon-to-carbon double bonds