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BI220 E1 L9

lecture 9 slides

QuestionAnswer
hydrocarbon structural forms 1. chains (linear / branching) 2. rings
saturated hydrocarbon h&c atoms bonded only with single bonds
unsaturated hydrocarbon double/triple bonds between c atoms
hydrocarbon backbones create lipids
hydrocarbon chem props nonpolar / hydrophobic; held together exclusively by van der waals; require stabilization in aq enviro of cell
hydroxyl groups form alcohols. polar. found in carbs, proteins, nucleic acids.
carbonyl groups form ketones and aldehydes. polar. found in carbs.
carboxyl groups form carboxylic acids (h+ attached) and carboxylates (- charged).. polar. found in proteins.
amino groups form amines. polar. found in proteins and nucleic acids. proton acceptor - makes group basic & + charged. strong ionic interactions w carboxyl (-).
sulfhydryl groups form thiols. slightly polar. found in proteins (cysteine). 2 covalently bond in oxidation rxn to form disulfide bridge in tertiary structure of proteins
phosphate groups form phosphates. very polar & - charged. found in nucleic acids & phospholipids
methyl group nonpolar :)
Created by: knorrod
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