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Lipids

Lipids. A lipid is any molecule that DOES NOT mix with water . They are “water fearing” / nonpolar ( hydrophobic ) Lipids function in: Energy (E) storage and as chemical messengers (e.g., hormones ) forming cell membranes Made up mostly of Carbon and Hydrogen (with a few Oxygen ).

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Lipids

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  1. Lipids • A lipid is any molecule that DOES NOT mix with water. • They are “water fearing” / nonpolar (hydrophobic) • Lipids function in: • Energy (E) storage • and as chemical messengers (e.g., hormones) • forming cell membranes • Made up mostly of Carbon and Hydrogen (with a few Oxygen)

  2. OH OH OH Lipids • Fats (Triglycerides) • Monomers: Glycerol + 3 Fatty Acids • No double bonds: saturated (solid) • Double bonds: unsaturated (liquid) OH Ester Bonds OH OH

  3. Lipids • Sterols • Lipids whose Carbon Skeleton consists of 4 fused rings • Includes: • Hormones • Cholesterol • Cortisol • Makes up cell membranes OH O OH O OH HO HO O O Testosterone Estrogen

  4. Lipids Phospholipids Monomers: Glycerol with Phosphate Head + 2 Fatty Acid Chains Amphiphilic (“Both” “lover”) Hydrophilic head Hydrophobic tail Forms 2 layers in water Makes up cell membranes Phosphate Glycerol Fatty Acids

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