2008 test - 1. Which of the following is not found in DNA?...

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Sheet1 Page 1 1. Which of the following is not found in DNA? 0 0.000 a) Adenine 0 0.000 b) Guanine 1 0.003 c) Cytosine 298 0.997 d) Uracil## 0 0.000 e) Thymine 2. A phosphodiester bond links which carbons together on the ribose backbone? 14 0.047 a) 4' to 2' 7 0.023 b) 6' to 1' 8 0.027 c) 3' to 2' 266 0.890 d) 5' to 3'## 4 0.013 e) 3' to 4' 3. The amino group of glycine can exist either in the protonated form (-NH3+) or as the free base (-NH2). In order to have 99 % 170 0.569 a) pH-pKa = -2## 37 0.124 b) pH-pKa = -1 40 0.134 c) pH-pKa = 0 20 0.067 d) pH-pKa = 1 30 0.100 e) pH-pKa = 2 4. Which of the following statements is correct? 2 0.007 a) a reaction is said to be spontaneous when it can proceed in either the forward or reverse direction. 1 0.003 b) a spontaneous process always happens very quickly. 30 0.100 c) a spontaneous process can occur only if there is a large increase in entropy. 132 0.441 d) a spontaneous process can proceed spontaneously in the reverse direction with an appropriate change in rea c 134 0.448 e) none of the statements. 5. The volume of a solution of 1 M NaOH that must be added to adjust the pH from 4 to 9 in 20 mL of a 100 mM solution of p h 6 0.020 a) 1 mL 266 0.890 b) 2 mL## 3 0.010 c) 3 mL 20 0.067 d) 4 mL 4 0.013 e) 5 mL 6. Indicate the ionic species that predominate at pH 3 I: Succinate(-2) II: CO3(-2) III: Succinic acid IV: H2CO3 V: Succinate(-1) VI: HCO3(-) 5 0.017 5 0.017 278 0.930 3 0.010 8 0.027 7. Indicate the ionic species that predominate at pH 8 I: HCO3(-) II: Succinate(-1) III: H2CO3 IV: Succinate(-2) V: CO3(-2) VI: Succinic acid 273 0.913 12 0.040 1 0.003 9 0.030 3 0.010 e) III & VI
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This note was uploaded on 10/11/2010 for the course ECONOMICS ECON 1B03 taught by Professor Holmes during the Fall '08 term at McMaster University.

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2008 test - 1. Which of the following is not found in DNA?...

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