1. Macromolecule -- Lipids

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

3. What are lipids used for?
TO STORE ENERGY

4. Unbranched Carbon Chain
Lipid Building Blocks
FATTY ACIDS
Unbranched Carbon Chain

5. Lipid Structure
POLAR HEAD
Glycerol
NON-POLAR TAIL
Fatty acids

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

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

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

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

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

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

12. Saturated vs. Unsaturated

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