HW1a - Chem 476 HW 1 Due"Structure of DNA Name Please...

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Chem 476 HW 1 Due August 31, 2007 “Structure of DNA” Name:________________________ Please complete all questions. Do your work on additional sheets of paper and staple to the back of this sheet. Do not put your answers on this page. You may work with your classmates on this and all homework assignments. I will grade the same three questions for all students and post the answers to the questions after they are due. I.) Problems from the textbook and supplement (do not hand in). Answers are in the textbook (short answers) and supplement (full answers to text AND supplement), but work through on your own first. : Text: 1.1-8, 10-13 Supp: 1.1-3, 5 II.) Additional Problems to hand in : Paper: “A Structure for Deoxyribose Nucleic Acid” Watson, J. and Crick, F. (1953) Nature 171 , 737-738. Define these terms: (Feel free to use other resources and to work together). Salt vs Free Acid Consider a weak acid HA=H + + A - . The salt would be M + A - , where M is a cation such as Na + . The acid would be HA. List known intermolecular interaction types. From lecture: H-bonding, electrostatics, van der Waals, hydrophobic effect Antiparallel strands The strands run in a parallel direction to each other, but going L to R one runs 5’ to 3’ and the other 3’ to 5’ Tautomer vs resonance structure Tautomers are two structures that differ only in the positions of protons; tautomers differ solely by a prototropic shift. Resonance structures are two structures that have the atoms in exactly the same position, but differ in the distribution of electrons about the structure. General Questions
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This note was uploaded on 07/23/2008 for the course CHEM 476 taught by Professor Bevilacqua,philip during the Fall '07 term at Penn State.

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HW1a - Chem 476 HW 1 Due"Structure of DNA Name Please...

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