1. Lipids

2. Lipid Structure 3 1 2 Fats, Oils, Waxes
Provide energy for cells, cell structure, insulation
Lipids & Proteins compose the cell membrane
Cholesterol: gives cell membrane flexibility
Structure (2 parts):
“Head” called glycerol
“Tails” called fatty acids
Monomer: Fatty Acid
Polymer: Lipid 3 1 2

3. Saturated Fatty Acids Long chain of C-C bonds (all single bonds)
Each C is “saturated” with H atoms
Solid at room temps; more likely to clog veins
Common in animal fats

4. Unsaturated Fatty Acids
Chain with C=C bonds (double bonds)
Double bonds prevents H from attaching
Double bonds makes the chain crooked
Unsaturated: Less space for H atoms
Liquid at room temps; Less likely to clog veins
Common in plant oils

5. Saturated vs. Unsaturated18 16

6. Kobe Kuiz What are the two parts of a lipid called?
Which part is the “head”? Which part are the “tails”?
How do saturated and unsaturated fatty acids differ?
Which lipid gives cells their flexibility?
Why are saturated fats less healthy?