Download - SWBAT: 1.Describe the characteristics of glycerophospholipids Chapter 15 15.5 Glycerophospholipids
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SWBAT: 1. Describe the
characteristics of glycerophospholipids
SWBAT: 1. Describe the
characteristics of glycerophospholipids
Chapter 1515.5 Glycerophospholipids
Chapter 1515.5 Glycerophospholipids
![Page 2: SWBAT: 1.Describe the characteristics of glycerophospholipids Chapter 15 15.5 Glycerophospholipids](https://reader031.vdocument.in/reader031/viewer/2022020721/56649e755503460f94b763b9/html5/thumbnails/2.jpg)
What are Glycerophospholipids?
What are Glycerophospholipids?• Similar to triglycerides except
one hydroxyl group is replaced by the ester of phosphoric acid and an amino alcohol
• Bonded through a phosphodiester bond
GlycerophospholipidsTriglycerides
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Amino AlcoholsAmino Alcohols
• Three amino alcohols found in glycerophospholipids are:
choline ethanolamine serine
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LecithinsLecithins
• Lecithins contain choline• Fatty Acids can be same,
different, saturated, unsaturated or mixture
• Abundant in:•brain tissue•nerve tissue•egg yolks •wheat germ
•yeast
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CephalinsCephalins
• Cephalins contain ethanolamine and sometimes serine
• Abundant in:•brain tissue•nerve tissue•egg yolks •wheat germ
•yeast
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Polar?Polar?
• Contain both polar and nonpolar regions• Ionized alcohol and phosphate portion is
called “the head”– Can hydrogen bond with water
• Two Fatty Acids represent “the tail”
• Hydrophobic Tails
• Hydrophilic Head Group
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Polar and Nonpolar RegionsPolar and Nonpolar Regions
• Most abundant in lipids in cell membrane
Nonpolar Tails
Polar Head
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HomeworkHomework
Chapter 15.5Pg 515#15.38 – 15.42
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SWBAT: 1. Describe the
composition and function of the lipid bilayer in cell membranes
SWBAT: 1. Describe the
composition and function of the lipid bilayer in cell membranes
Chapter 1515.7 Cell MembranesChapter 15
15.7 Cell Membranes
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Cell MembraneCell Membrane
• Composed of phospholipid bilayer
• Polar head & nonpolar tails• Semipermeable – items can
enter and leave
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Lipid BilayerLipid Bilayer
• Double row arrangement of phospholipids
• Hydrophilic polar heads align on outer edges of membrane
• Hydrophobic nonpolar tails move to center
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Fluid Mosaic ModelFluid Mosaic Model
• Lipid bilayer contains unsaturated Fatty Acid
• Cis double bonds causes a non-rigid structure
• In liquid like bilayer:• Proteins• Carbohydrat
es• Cholesterol
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HomeworkHomework
Chapter 15.7Pg 524 – 525 #15.56 – 15.62