HW1 - Biological Sciences 102 Spring, 2008 Homework #1 Prof...

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Unformatted text preview: Biological Sciences 102 Spring, 2008 Homework #1 Prof R Holland Cheng 1 9 Learn the structures and the codes of the twenty amino acids. In Biochemical Calculations (Segel), go through example 1 13 (stating in page 18) concerning weak acid/base concepts. Work out the assigned practice problem #17, 24, 29, 32, 34, 36, 40, 45 and 48 (pages 92 93). ** Use the following table of pK a s to answer problems 6 - 10. Compound pK a s Phosphate 2.12, 7.21, 12.32 Tris 8.21 Amino acid side chains C 8.3 D 3.9 E 4.2 H 6.0 K 10.5 R 12.5 Y 10.1 Amino acid -carboxyl group 2.1 Amino acid -amino group 9.6 Oligopeptide N-terminal amino group 7.4 Oligopeptide C-terminal carboxyl group 3.6 1. Citric acid, a tri-carboxylic acid important in intermediary metabolism, can be symbolized as H 3 A. Its dissociation reactions are H 3 A H + +H 2 A pK a1 = 3.13 H 2 A H + +HA 2 pK a2 = 4.76 HA 2 H + +A 3 pK a3 = 6.40 If the total concentration of the acid and its anion forms is 0.02 M, what are the individual concentrations of HIf the total concentration of the acid and its anion forms is 0....
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HW1 - Biological Sciences 102 Spring, 2008 Homework #1 Prof...

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