TURN OVER your scantron and start with 51 MULTIPLE CHOICEf2ptseach)#51-58 51. Wh
ID: 1044782 • Letter: T
Question
TURN OVER your scantron and start with 51 MULTIPLE CHOICEf2ptseach)#51-58 51. Which of the following compounds will NOT be ionized at PH 74 A) 52. Which of the following is a secondary alcohol? ??? CH CH2NH2 CH 53. Which of the following pictures A) represents the zwitterion, structure of the amino acid serine at physiological pH = 7.4 54. Which of the folowing pictures represents the methyl ester of the amino acid serine at physiological pH -7.4 CH2 D) OH productfrormth secarbonation of thefolowingmolecule? 55. What is the A) butanone B) 3-methylbutanone C) 1-hydroxy-3-pentanone D) 2-hydroxy-3-pentanone E) acetone ?? Questions 58-58 refer to the structure of kainic acid Kalnle acld is a natural marine acid presant in some sesweed ?? 56. How many chiral carbons are in kainie acid n? A) four B) six C) two D) three E) five 57. What will be the charge on this molecule at pH 7.4? A) +1 B)0 C)-1 D)-2 E)-3 ?? 58. The amine in this molecule is A)primary B)secondary C} tertiary ?? D) quaternary E) benzylicExplanation / Answer
51. E
electron density is provided by the methyl groups so it will not release the proton at pH 7.4.
52. D
hydroxy group is connected with CH2.
53. D
proton will be released easily from the carboxylic acid group in comparison with the hydroxy group.
54. B
this is the only compound in all which consist methyl group with serine ester at pH 7.4.
55. A. butanone.
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