Exam I FS 2007 - 11. Draw methyl ethyl ketone (2-butanone)...

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Exam I Name:_____________________________ Biochemistry 4270/7270 Last 4 Digits of Student No. __ __ __ __ August 31, 2007 Draw ALL atoms for ALL structures! 1. Draw one of the amino acids with a negative “R” group at pH 5.2. (5 points) 2. Draw one of the aliphatic amino acids at pH 7.6. (5 points) 3. Draw propionaldehyde (propanal) at pH 10. (5 points) 4. Draw the isoelectric form of cysteine. (5 points) 5. Draw isopropanol (1-methyl ethanol) (5 points) 6. Draw tert -butylamine (1,1-dimethyl ethylamine) (5 points) 7. Draw N-methylacetamide (N-methyl ethylamide) (5 points)
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8. Draw the titration curve of tyrosine on the graph below. CLEARLY indicate the pKa values and the boundaries of the buffer “boxes” and CLEARLY indicate the pI (10 points) Titration Curve of Tyrosine 0 2 4 6 8 10 12 14 0 0.5 1 1.5 2 2.5 3 3.5 4 Equivalents of NaOH pH 9. What is the pH of the solution of 0.125 M acetic acid and 0.145 M sodium acetate? The pKa of acetate buffer is 4.76. (5 points) pH = ___________ 10. Draw butanedioic acid (succinate) at pH 9.8. (5 points)
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Unformatted text preview: 11. Draw methyl ethyl ketone (2-butanone) (5 points) 12. Draw any one of the aromatic amino acids at pH 5.3, Write its full name and its single letter abbreviation (10 points) Name:________________ Single Letter Abbreviation: ___ 35 points this page 35 points this page 13. Which of the amino acids is represented in the following titration curve? (10 points) The amino acid is _____________________ (full name), Single letter abbreviation ____ Which Amino Acid is Represented by the Titration Curve? 2 4 6 8 10 12 14 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Equivalents of KOH pH 14. A solution of an unknown compound at pH 5.2 contains 0.45 M of the protonated form and 0.55 M of the unprotonated form. What is the pKa of the unknown compound? (5 points) pKa = ___________________ 15. Draw cis-2-Pentene (5 points) 16. Draw all four forms of histidine at pH 4.8 (10 points) 30 points this page...
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This note was uploaded on 02/21/2010 for the course BIOCHM 4270 taught by Professor Emerich during the Spring '07 term at Missouri (Mizzou).

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Exam I FS 2007 - 11. Draw methyl ethyl ketone (2-butanone)...

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