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Unformatted text preview: Characteristics Nonpolar: electrons are shared equally Hydrophobic Types of Lipids: Triglycerides Solid fats and liquid oils 3 fatty acids and glycerol( 3-carbon alcohol) Phospholipids Polar and Nonpolar Mostly in cell membranes 1 glycerol, 2 FA, and polar group Steroids Complex ring forms Steroid hormones estrogen; testosterone Proteins Amino acid polymers Many roles in cells Joined by peptide bonds by dehydration reaction Different proteins have different amino acids Levels of protein structure Primary: link amino acids by peptides bonds Secondary: coiling, it bonds Tertiary: bending long-distance interactions disulfide or H-bonds Quaternary: 2 or more chains together Nucleic Acids Polymers of nucleotides DNA and RNA: function in genetics Other types of nucleotides function in cell control Nucleotides 5 carbon sugar, phosphate, base Nucleic Acid molecules Genetic info in order of bases Connected by sugar-phosphate backbone...
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- Spring '08