Lipids

Lipid Structure Fats, Oils, Waxes Glycerol molecule 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” = glycerol “Tails” = fatty acids Monomer: Fatty Acid Polymer: Lipid

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

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 Common in plants Health Alert! Liquid at room temps; Less likely to clog veins

Saturated vs. Unsaturated 18 16

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?