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Lipids. Lipid Structure. 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
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Lipid Structure 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
Review 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?
