Spring 10 - Name CHEM 340.01 Biochemistry I E xam 1 F Part...

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Name: ______________________________________________________________________________ 1 CHEM 340.01: Biochemistry I Exam 1 February 17, 2010 Part I: Eeny, meeny, miney moe…. For questions 1-20, choose the single best answer. Please mark your answer on the Scantron card AND on the exam. Thank you. (2 pts. each) 1) One of the properties or features of water that make is such a unique substance is its: a) molecular weight. b) chemical composition. c) availability. d) electronic geometry. 2) Biological molecules such as proteins and DNA have the 3D structures that they do due to: a) how they interact with water. b) their chemical compositions. c) their limited lifetimes. d) their being made mostly of carbon. 3) The formation of a single hydrogen formation involves ___ atoms. 4) The ionization constant of water is: 5) Water has a very high dielectric constant. What is the significance of this property with respect to keeping a cell alive? 6) The strongest hydrogen bonds (H-bonds) are formed when the: a) atoms involed are in a straight line. b) hydrogen is attached to an oxygen. c) hydrogen is attached to a nitrogen. d) atoms involved are not all in a straight line.
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Name: ______________________________________________________________________________ 2 7) You have two solutions. One is a 10 mM acetic acid solution and one is a 10 mM NaH 2 PO 4 TRUE? (see the Supplementary Information sheet for help)
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