What makes phospholipids good at forming cellular membranes?○ Regions of aliphatic and hydrophilic atoms causing an internalization of phosphorous making a bilayerO The polar and non-polar regions create an amphipathic bilayer of phospholipidsCovalent and ionic bonds between glycerols create a tight seal around the cellO The three saturated fatty tails in phospholipids create a semi solid like structure that maintains a cell's shapeO The four ring structure of cholesterol serves as a scaffold for making hormones

Introduction : Phospholipids are esters comprising two fatty acid molecules joined to a glycerol…

What makes phospholipids good at forming cellular membranes? O Regions of aliphatic and hydrophilic atoms causing an internalization of phosphorous making a bilayer O The polar and non-polar regions create an amphipathic bilayer of phospholipids O Covalent and ionic bonds between glycerols create a tight seal around the cell O The three saturated fatty tails in phospholipids create a semi solid like structure that maintains a cell's shape The four ring structure of cholesterol serves as a scaffold for making hormones

What makes phospholipids good at forming cellular membranes? O Regions of aliphatic and hydrophilic atoms causing an internalization of phosphorous making a bilayer O The polar and non-polar regions create an amphipathic bilayer of phospholipids O Covalent and ionic bonds between glycerols create a tight seal around the cell O The three saturated fatty tails in phospholipids create a semi solid like structure that maintains a cell's shape The four ring structure of cholesterol serves as a scaffold for making hormones

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 is a true statement? Sphingolipids contain 2 hydrophobic, acyl chains Phospholipids contain 3 hydrophobic acyl chains Sphingolipids are completely no-polar, hydrophobic molecules The different types of phospholipids do not have different physical properties when in the membrane
phospholipid bilayer O protein 10 O cholesterol n protein cholesterol Using the diagram above, which component of this membrane contains a hydrophobic region and acts as the primary barrier to most foreign substances" carbohydrate chain carbohydrate chain Ophospholipid bilayer
Sort the descriptions into properties that describe either saturated phospholipids or unsaturated phospholipids. Saturated phospholipids have straight fatty acid tails have no double bonds in the fatty acid carbon chains fatty acid tails pack tightly together produce a fairly inflexible membrane at low temperatures Saturated and unsaturated phospholipids maintain some space between adjacent phospholipids are built upon a glycerol backbone Answer Bank Unsaturated phospholipids have bent fatty acid tails contain one or more double bonds within the fatty acid tails allow the membrane to remain fluid and flexible at low temperatures
The diagram below illustrates the molecular structure of the cell membrane. The phospholipid bilayer of a cell membrane A B polar group с phosphate glycerol Which of the following is false about the way in which the cell membrane maintains its structure? D water water The different components of an individual phospholipid are held by covalent bonds. The attraction between the individual lipid tails inside the cell membrane is maintained by van der Waals forces. The attraction between the phosphate groups and the water molecules inside and out. side of the cell is maintained by hydrogen bonds. The bonds between the individual phospholipids that make up the cell membrane are connected by covalent bonds.
Which of the following statements is true of phospholipid bilayers? O The surfaces are covered by the hydrophobic tails O They spontaneously form in water O Covalent bonds lock the molecules together into the bilayer O They are considered secondary structures of phospholipids
Which of the following statements about lipids in membranes is FALSE? O Membrane curvature may be controlled by the size of head groups in lipids O Lipids can move laterally within a membrane leaflet O Liposomes are synthesized membrane structures used to study membranes in the laboratory Flexion is when the hydrophobic tails of lipids swing and cross each other O Lipids flip-flop from the inner leaflet to the outer leaflet spontaneously
Which of the following components of the cell membrane is found exclusively in the inner layer of the lipid bilayer? Ocholesterol O glycolipids O charged phospholipids O channels O receptors
H "H H H HO Choose all of the following are true of the given structure? (Choose all of the correct answers)
How do phospholipids interact with water molecules? Phospholipids do not interact with water because water is polar and lipids are nonpolar. The polar heads interact with water; the nonpolar tails do not. The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract). Phospholipids dissolve in water.
A phospholipid can be used to do all the following except O Increase the fluidity with the presence of unsaturated fatty acid tails. create a bi-layer membrane using amphipathic properties. form a micelle using a single layer and a hydrophobic core. O connect to a glycerol molecule to create a triacylglyceride.
A lipid bilayer was prepared from equal amounts of the following lipids: • 1-lauryl-2-palmitoylphosphatidylcholine • 1-myristoyl-2-linoleoylphosphatidylcholine Adding cholesterol to the lipid bilayer prepared above will most likely O decrease bilayer fluidity O increase bilayer fluidity have no effect on bilayer fluidity O destroy the bilayer
Which portion of a phospholipid is hydrophilic? saturated fatty acid tails none- a phospholipid is a lipid so the entire molecule is hydrophobic glycerol/phosphate heads unsaturated fatty acid tails