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Lecture_2_ESM219_07

Lecture_2_ESM219_07 - 1 ESM219 F07 Class meeting 2 Concepts...

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Unformatted text preview: 1 ESM219 F07 Class meeting 2 Concepts: Chemistry • Chemical elements – e.g. stoichiometry of E. coli • Macromolecules – Polysaccharides: polymers of sugars – Lipids: polymers of fatty acids – Nucleic acids: polymers of nucleotides – Proteins: polymers of amino acids Chemical Elements Chemical Elements Chemical Elements b o n d s bonds b o n d s Molecule C h e m ic a l E le m e n ts C h e m ic a l E le m e n ts C h e m ic a l E le m e n ts bonds b o n d s b o n d s M o le c u le Macromolecule = Polymer Atoms (O,N, etc.) Molecules (O 2 , N 2 , etc.) Macromolecules= polymers (proteins, RNA DNA, lipids, polysaccharides) Monomers (amino acids, nucleotides fatty acids, saccharides) Cells Elements • C, N, H, O, (P, K, Mg, Mn, etc.) – See Handout “Numbers in Microbiology” • Same elements as other life forms • Atoms, molecules together as functional groups – Special properties – Table 3.1, e.g. alcohols Bonds and Interactions • Hydrogen Bonds – Bind pairs of nucleobases together in DNA – Hold amino acids together in proteins – Water’s H bonding makes it a polar substance • Small positive charge on H’s • Small negative charge on O • Nonpolar, or hydrophobic, substances “fear” water...
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Lecture_2_ESM219_07 - 1 ESM219 F07 Class meeting 2 Concepts...

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