1. LIPIDS

2. ELEMENTS FOUND IN LIPIDS
CARBON (C)
HYDROGEN (H)
OXYGEN (O)
Sound familiar?
These are the same elements found in carbohydrates!
So … what do you think makes lipids different from carbohydrates?
The difference is in the arrangement and number of each of these atoms

3. These Are Lipids Fats (includes oils and waxes)
2. Phospholipids
3. Cholesterol
We will focus our attention on the structure and function of these 2 lipids

4. Structure of a Fat Molecule
Triglyceride

5. 1 glycerol molecule + 3 fatty acid molecules  1 fat molecule
Fats
1 glycerol molecule + 3 fatty acid molecules  1 fat molecule

6. Here is the triglyceride molecule formed from dehydration synthesis

7. 1 glycerol + 2 fatty acids + 1 phosphate  1 phospholipid
Phospholipids
1 glycerol + 2 fatty acids + 1 phosphate  1 phospholipid
How many water molecules are formed from this reaction? 3

8. Can you write a word equation for the hydrolysis of a fat molecule?
fat + water  1 glycerol + 3 fatty acids

9. Now write a word equation for the hydrolysis of a phospholipid
phospholipid + water  1 glycerol + 2 fatty acids + 1 phosphate

10. Why do organisms need lipids?
FATS AND OILS
Energy reserve—
there is much chemical energy in the bonds of lipids
PHOSPHOLIPIDS
A major component of the plasma membrane and the membranes surrounding the organelles