biochemexam1.07

biochemexam1.07 - CHEM4711 Part I Intro/aqueous...

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CHEM4711 9/20/07 Exam 1 Part I: Intro/aqueous solutions/buffers [4 points] 1. Is it accurate to say that humans are more evolved than bacteria? Why or why not? [6 points] 2. The dielectric constant in the core of a protein can be as low as 6.0, whereas the dielectric constant on the exterior of a protein is 78. Would the strength of a typical hydrogen bond be stronger, weaker, or unchanged in these different environments? Explain/justify your answer. [8 points] 3. Calculate/show how you would calculate the pH of: a) 0.01M NaOH b) 4 x 10 -3 M HCl c) 5 x 10 -8 M NaOH [6 points] 4. Calculate the pH for each case below. Your final answer should be a number. Also justify your answer (1 sentence) in each case. a) a solution of acetic acid in which acetate [AcO-] is at 100-fold lower concentration than acetic acid [HOAc]. b) a solution of acetic acid in which [AcO-] is at 100-fold higher concentration than [HOAc]. Part II: Properties of amino acids [10 points] 5. Draw the mechanism (i.e. arrow pushing) for: a) the conversion of N D in aqueous solution. b)
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This note was uploaded on 10/08/2008 for the course CHEM 4711 taught by Professor Taatjes during the Fall '08 term at Colorado.

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biochemexam1.07 - CHEM4711 Part I Intro/aqueous...

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