Macromolecule -- Lipids

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Presentation transcript:

Macromolecule -- Lipids

What are lipids? Non-polar organic molecules They have a lot of C-H bonds

What are lipids used for? TO STORE ENERGY

Unbranched Carbon Chain Lipid Building Blocks FATTY ACIDS Unbranched Carbon Chain

Lipid Structure POLAR HEAD Glycerol NON-POLAR TAIL Fatty acids

Types – (1) Triglycerides 3 fatty acids & glycerol (alcohol)

Types – (2) Phospholipids 2 fatty acids & glycerol Used to make cell membrane

Types – (3) Waxes A long fatty acid chain & a long alcohol chain

Types – (4) Steroids Composed of four fused carbon rings with added groups NO FATTY ACID CHAIN! Includes HORMONES Testosterone Cholesterol

Saturated Lipids All the bonds are filled in the fatty acid tail

Unsaturated Lipids Not all bonds are filled in fatty acid tail There are DOUBLE BONDS

Saturated vs. Unsaturated

Examples… Saturated triglyceride Unsaturated triglyceride Shortening or animal fat Solid! Unsaturated triglyceride Plant seeds or fruit Liquid!