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Biochemistry of Cells
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Lipids are hydrophobic water fearing

Includes fats, waxes, steroids, & oils

Do NOT mix with water

FAT MOLECULE

Slide 38

Function of Lipids

Function of Lipids

Fats store energy, help to insulate the body, and cushion and protect organs

Slide 39

Types of Fatty Acids

Types of Fatty Acids

Unsaturated fatty acids have less than the maximum number of hydrogens bonded to the carbons (a double bond between carbons)

Saturated fatty acids have the maximum number of hydrogens bonded to the carbons (all single bonds between carbons)

Slide 40

Types of Fatty Acids

Types of Fatty Acids

Single Bonds in Carbon chain

Double bond in carbon chain

Slide 41

Triglyceride

Triglyceride

Monomer of lipids

Composed of Glycerol & 3 fatty acid chains

Glycerol forms the backbone of the fat

Organic Alcohol (-OL ending)

Slide 42

Triglyceride

Triglyceride

Glycerol

Fatty Acid Chains

Slide 43

Fats in Organisms

Fats in Organisms

Most animal fats have a high proportion of saturated fatty acids & exist as solids at room temperature (butter, margarine, shortening)

Slide 44

Fats in Organisms

Fats in Organisms

Most plant oils tend to be low in saturated fatty acids & exist as liquids at room temperature (oils)

Slide 45

Fats

Fats

Dietary fat consists largely of the molecule triglyceride composed of glycerol and three fatty acid chains

Glycerol

Fatty Acid Chain

Condensation links the fatty acids to Glycerol

Slide 46

Lipids & Cell Membranes

Lipids & Cell Membranes

Cell membranes are made of lipids called phospholipids

Phospholipids have a head that is polar & attract water (hydrophilic)

Phospholipids also have 2 tails that are nonpolar and do not attract water (hydrophobic)

Slide 47

Steroids

Steroids

The carbon skeleton of steroids is bent to form 4 fused rings

Cholesterol is the base steroid from which your body produces other steroids

Estrogen & testosterone are also steroids

Cholesterol

Testosterone

Estrogen

Slide 48

Synthetic Anabolic Steroids

Synthetic Anabolic Steroids

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