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Presentation on theme: "LIPIDS."— Presentation transcript:


2 Characteristics of Lipids
Composed of Carbon, Hydrogen, and Oxygen More than 2 Hydrogens for each Oxygen Includes fats, oils, waxes, phospholipids, steriod hormones and cholesterol Triglycerides are neutral fats. Energy storage molecules Triglycerides are 3 fatty acids and 1 glycerol.

3 A Triglyceride 3 Tails of Fatty Acid are attached to One glycerol molecule. Triglyceride Fork-like shape:

4 Glycerol

5 A Representative Fatty Acid

6 Saturated Fat Saturated fats are solid at room temp.
All C-C bonds are single bonds. Carbons are “saturated” with Hydrogens.

7 Examples of Saturated Fat

8 Unsaturated Fatty Acid Saturated Fatty Acid

9 Unsaturated Fats/OIL One or more C=C bond.
Less Hydrogen, some Carbons are unsaturated with H. Liquid at room temp. Oils

10 Dehydration Synthesis of a Fat

11 Phospholipid Facts Polar Phospholipids make up most of a cell membrane
Made of a polar “head” with a + AND - charge With 2 non-polar fatty acid tails

12 A Phospholipid A phosphate group 2 Fatty Acids
Polar phosphate end is hydrophilic (water loving) Non-polar lipid end is hydrophobic (water hating)


14 Waxes Plants make a waxy coating to protect leaves from drying out.
Bees make wax for a building material. Store honey and eggs in wax honey comb.

15 Steroid Hormones Cholesterol plus a special molecule called a “functional group”. <<< Cholesterol. Hormones are chemical messengers in the blood

16 Examples of Steroids Testosterone: male sex hormone
Progesterone and Estrogen: female sex hormones Cortisone: regulates growth and body functions

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