BSCI 10120 Lecture Notes - Lecture 10: Dehydration Reaction, Monosaccharide, Chitin

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Many are polymers made and broken by : Beta linkages - cellulose, chitin (bottom gure a,b: nucleic acids. Rna- link between dna(blueprint) and proteins (that do the actual work of cells) You can tell the di erence between dna and rna based on what is attached to the 2~ these are the sugars of the group. 3~ and 5~ carbons joined by phosphodiester linkage. 3~ end of nucleic acid are added to the unlinked 3~ hydroxyl. Note arrow shape and 1-d structure vs dna structure. Dna- double strand held by hydrogen bonds where the nitrogen bases connect. Road like because the sugar phosphates are parallel to each other 3~ to 5~ and 5~ to 3~ Support - structural support to hold cell shape. Motion - to make cells that contract (ex muscles) Contain : (-nh2) or amino end (-cooh) or carboxyl end. Ionized form of amino acid called amino group (acts as base)

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