1. Lipids: Fats, Phospholipids and Steroids

2. Lipids Does not have monomer or polymer
Atoms: carbon, hydrogen and a few oxygen
Does not have monomer or polymer
Main parts are called glycerol and fatty acids-long chains of carbon and hydrogen

3. Lipids Six functions of lipids: 1. Long term energy storage
2. Protection against heat loss (insulation)
3. Protection against physical shock
4. Protection against water loss
5. Chemical messengers (hormones)
6. Major component of membranes (phospholipids)
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4. Unique Characteristics
Lipids are insoluble in water aka hydrophobic
Lipids are soluble in hydrophobic solvents.
Store more energy than other macromolecules

5. Fats Composed of 1 glycerol and 3 fatty acids. Fatty acids
Ester Linkage
Fatty acids
Glycerol

6. Fat Functions 1. Energy Storage
2. Protection against heat loss (insulation)
3. Protection against physical shock
4. Protection against water loss
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7. Saturated vs. Unsaturated
Which is which? How are they different?

8. Saturated vs. unsaturated

10. Phosopholipids

11. Phosopholipids
Major component of membranes

12. Steroids
______ ring carbon skeleton Chemical groups play a major role in function

13. Steroids
In animals cholesterol is the precursor for steroid hormones Obtained from food and synthesized in the liver

14. Steroids Functions Chemical messengers (hormones)
Component of membranes