BISC 101 Lecture Notes - Lecture 2: Collagen, Triple Bond, Guanine

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Bisc 101 lecture 2 - biological molecules. Living things are made up of four classes of large biological molecules: proteins, nucleic acids, carbohydrates, lipids. Carbon 1 bonds to the oxygen attached to carbon 5: glucose can form into a linear form or ring form, different configurations produce alpha glucose and beta glucose. Alpha glucose: the c oh bond is forming downwards. Complex carbohydrates: glycosidic linkage: simple sugars polymerize when a condensation reaction occurs between tow hydroxyl groups resulting in a covalent bond. Location of glycosidic bonds vary as every monosaccharide contains at least 2 hydroxyl groups. A linear molecule rather than a helix formation. Lipids: carbon containing compounds in organisms that are largely nonpolar and hydrophobic: does not dissolve, lipids do dissolve in liquids consisting of nonpolar organic compounds. Lipids cannot dissolve in water because they have many hydrocarbons which form non polar covalent bonds. Lipids have little or no affinity for water.

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