Chem 4A - Spring 2006 - - Midterm 3

Chem 4A - Spring 2006 - - Midterm 3 - Chemistry 4B S2006...

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Chemistry 4B Name:___________________________ S2006 GSI:_____________________________ 1 Chemistry 4B, Spring 2006 Midterm 3 April 17, 2006 (closed book, 50 min.) N a m e : G S I : S I D : S e c t i o n : Write your name and that of your GSI on all 9 pages of the exam. Amino acid chemical structures are given on p. 2 in the protonated form. Nucleotides are given on p. 3 with physiological protonation. In order to maximize your score on the exam: • Do the questions you know how to do first. • Go back and spend more time on the questions you find more challenging. • Budget your time carefully–don't spend too much time on one problem. • Show all work for which you want credit and don't forget to include units. Question Page Points Score 1 4 15 2 5 15 3 5-6 15 4 6-7 25 5 8 10 ____ 6 8-9 20 T o t a l : 1 0 0
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Chemistry 4B Name:___________________________ S2006 GSI:_____________________________ 2 Protonated amino acids.
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Chemistry 4B Name:___________________________ S2006 GSI:_____________________________ 3 Nucleotides with physiological protonation.
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Chemistry 4B Name:___________________________ S2006 GSI:_____________________________ 4 1. (15 points) You have discovered a protein that promotes peace and calm before big exams, and are excited to figure out how it works. So far, you have been able to determine a fragment of its sequence, as shown below. N-Arg-Tyr-Gly-Ser-Leu-Asp-Ile-Asp-Val-Asn-Met-Ala-Ala-Glu-Lys-Ser-Pro-Phe-C
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Chem 4A - Spring 2006 - - Midterm 3 - Chemistry 4B S2006...

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