LIPIDS

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

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

Structure of a Fat Molecule Triglyceride

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

Here is the triglyceride molecule formed from dehydration synthesis

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

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

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

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