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9.14.05 - Announcements Sunday at 6 Dining Discussion on...

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September 14, 2005 Nucleic acids Two types: DNA o Genetic material of life o Guides the synthesis of RNA, which controls protein syntheses o The structure guides replicartion process RNA o Mrna –Messenger o Rrna & other ribozymes o Trna o Micro RNA – Regulate Trna Nucleic acids are polymers of nucleotides STRUCTURE o Pentose (4C, 1O), Phosphate, Nitrigenous BASE o The sugar forms the backbone. o Connect with the 5C and 3C DNA vs. RNA Deoxyribose Sugar Ribose Sugar Double Strand Single Strand ATGC AUGC Nitigenous Bases o Pyridimines 1 ring C (dr), T(d), U(d) o Purines 2 rings Structure of DNA (According to Watson & Crick) Two strands coiled into a double helix 5 3 3 5 The stands are the backbone, which is outside Base Pairing Rules: A = T G=C Angstroms must be the distance between each. 3 H-bonds attach each nucleotide from two diff strands. Announcements: Sunday at 6 – Dining & Discussion on Mars PRELIM 1 next Thursday
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Membranes & the scientific method
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