Chapter 3: Biochemistry

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Presentation transcript:

Chapter 3: Biochemistry Lipids Chapter 3: Biochemistry

Lipids Large non-polar organic molecule Does not dissolve in water High ratio of carbon and hydrogen atoms Four types of lipids Triglycerides (fat) Phospolipids Waxes Steroids

Triglycerides

Triglycerides Saturated Fat Have no double bonds in their fatty acid chains Straight chain Usually animal fats Solid at room temperature

Triglycerides Unsaturated Fat Have at least one double bond in their fatty acid chain Forms a kink in the chain Usually oils and from plants Liquid at room temperature

Phospholipid

Phospholipid Found in all our cells Makes up the cell membrane 2 layers of phospholipids  lipid bilayer

Phospholipid Bilayer

Wax One fatty acid chain to a glycerol Waterproof Create protective layer in animals and plants

Steroids - hormones

Steroids Four carbon rings linked together Usually our hormones Ex: Cholesterol is found in our cell membranes

http://www.hhmi.org/biointeractive/obesity/obesity_molecular/01.html http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP13204

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