Chem112C-S10-MTII-A-key

Chem112C-S10-MTII-A-key - 1 Circle the letter corresponding...

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! 1) Circle the letter corresponding to the correct answer (2 pts. each). A. acidic C. neutral B. basic D. a 2° amine A. 4.40 C. 5.41 B. 6.78 D. 10.82 A. cation C. neutral, no charges B. anion D. zwitterion This ! -amino acid is classified as: At the isoelectric point, the amino acid is "all": pKa 1 corresponds to equilibrium (3 pts.): R OH O NH 3 R O O NH 2 R OH O NH 2 R OH O NH 2 H 2 O H 2 O H 3 O H 3 O A. C. D. B. pKa 2 corresponds to equilibrium (3 pts.): R O O NH 2 R O O NH 3 H 2 O H 3 O R OH O NH 3 R O O NH 2 R OH O NH 2 R OH O NH 2 H 2 O H 2 O H 3 O H 3 O A. C. D. B. R O O NH 2 R O O NH 3 H 2 O H 3 O A. CONH 2 C. CO 2 H B. (CH 2 ) 2 CONH 2 D. NH 2 If pKa 1 = 2.02 and pKa 2 = 8.80, the isoelectric point (pI) equals: a b a b a b b c b c b c b c The side chain is: R OH O NH 3 R O O NH 3 H 2 O H 3 O If pH = 8.80, the ratio of species in solution is: B. 1:1 zwitterion : anion D. 1:1 zwitterion : cation A. 1:1 cation : neutral C. 1:1 cation : anion If pH = 2.02, the ratio of species in solution is: B. 1:1 zwitterion : anion D. 1:1 zwitterion : cation A. 1:1 anion : neutral C. 1:1 cation : anion R OH O NH 3 R O O NH 3 H 2 O H 3 O a b OH O NH 2 Asparagine H 2 N O /18 Chem112C–S10
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! 2) Circle the letter corresponding to the correct answer (2 pts. each). Circle the correct monosaccharide-2 that is formed along with 1 when the disaccharide is treated with HCl/H 2 O. Keep the anomeric position the same as in the parent disaccharide. The Fischer projection corresponds to an: Consider the open chain form to determine: A. 1 is an aldohexose 2 is an aldohexose C. 1 is a ketohexose 2 is a ketohexose B. 1 is a ketohexose 2 is an aldohexose D. 1 is an aldohexose 2 is a ketohexose A. oxocarbenium ion C. S N 2 transition state B. tetrahedral D. aldehyde A. B. 2 In the step-by-step mechanism for the treatment of the disaccharide with HCl in H 2 O: D. C. 2
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This note was uploaded on 08/15/2010 for the course BIO 5c taught by Professor Zhu/cardullo/rao during the Spring '08 term at UC Riverside.

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Chem112C-S10-MTII-A-key - 1 Circle the letter corresponding...

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