1. Set up Paper for Cornell Notes
LIPIDS

2. A student preparing for a hike wants to pack a snack that has biomolecules that provide quickly available energy but few excess calories. Which nutrition label lists the best combination of biomolecules that provide quickly available energy while providing the fewest calories from other types of biomolecules?

3. Monomer:

4. Examples- who am i
Fats
Oils
Steroids
Waxes
Vitamins

5. What’s a lipid? (who am I)
Non-polar (no charge) organic molecules
Insoluble in water
(Doesn’t mix with water)
Hydrophobic= water fearing
Made of C,H,O
Ratio is usually greater than 2:1 Hydrogen to Oxygen

6. Functions - What do I do? Biological membranes Store long term energy
Insulation
Cushion
Waterproofing
Fat soluble Vitamins
Steroids (sex hormones)

7. Where am I made?
Lipids are made in the smooth endoplasmic reticulum

8. Monomer - Fatty acids Solid at room temperature. (bad for us!)
Saturated fatty acid- single bonds, straight and tightly packed.
Solid at room temperature. (bad for us!)
Unsaturated fatty acid- double bonds bend the tails and it’s crooked (not straight).
Liquid at room temperature (ex. Olive Oil)

9. Which is saturated?
Which is unsaturated?

10. Which is saturated?
Which is unsaturated?

11. Phospholipids (Cell membranes) Steroids (Sex hormones) Waxes
Types of lipids
Triglycerides
Phospholipids (Cell membranes)
Steroids (Sex hormones)
Waxes
Vitamins (fat soluble A, D, E, & K)

12. E 1. Triglyceride Made of one glycerol head and 3 fatty acids
Looks like the letter E
A typical fat- stored in your body for long term energy

13. 2. phospholipids One phosphate group and 2 fatty acid chains
Makes up the cell membrane of all organisms- makes a bilayer that controls what comes into cell

14. 3. Steroids and Vitamins No fatty acid chains Has 4 carbon rings
Makes up some hormones and vitamins (testosterone, progesterone, & estrogen)
4 linked carbon rings – 3 hexose, 1 pentose

15. Cholesterol
Made in the liver – Precursor to all steroids

16. But sometimes they look like this:
In general…
Lipids are long chains of carbon and hydrogen:
But sometimes they look like this: