biochem-midterm-1-answers

biochem-midterm-1-answers - Chem 153A, Winter 2009 Midterm...

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Chem 153A, Winter 2009 Midterm Exam 1 Midterm 1 Answer Key Part I. Multiple Choice. 1. A grain of salt 2. 20 4 3. Water has a high dielectric constant and is able to dissolve polar substances well. 4. D-sugars and L-amino acids 5. Glycerophospholipids are amphipathic and form micelles and bilayers in aqueous solution. This is incorrect because glycerophospholipids do not form micelles. Part II. True or False? Note that the order of these questions varies for different exam versions; see your TA to see the order for your exam. A protein’s entropy increases as it folds. False ; a protein’s entropy decreases as it folds. Water entropy increases. The strength of a hydrogen bond depends in part on the electronegativities of the atoms bonding to hydrogen. True The ability of water to form hydrogen bonds is an important factor contributing to the hydrophobic effect. True The greater flexibility of saturated fatty acids (versus unsaturated) produces greater flexibility in a membrane bilayer. False
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This note was uploaded on 04/25/2010 for the course BIOCHEM 142637201 taught by Professor Dr.nelson during the Spring '09 term at UCLA.

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biochem-midterm-1-answers - Chem 153A, Winter 2009 Midterm...

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