Exam 1 Key 2008

Exam 1 Key 2008 - Page 1 of 4 Name Student number BCHM 2024 Examination 1 1 The pH of pure water at 25o C is 7.00 What is the hydrogen ion(H

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Name ___________________________ Student number _____________________ BCHM 2024 Examination # 1, February 20, 2008 1. The pH of pure water at 25 o C is 7.00. What is the hydrogen ion (H + ) concentration in pure water at this temperature? A. 1 millimolar (1 x 10 -3 molar) D. 0.1 millimolar B. 1 micromolar (1 x 10 -6 molar) E. 0.1 micromolar C. 1 nanomolar (1 x 10 -9 molar) F. 0.1 nanomolar 2. By definition, an acid is a: A. Proton donor C. Electron pair donor B. Proton acceptor D. Nucleophile 3. Trypsin hydrolyzes peptide bonds specifically at what amino acid residues? A. Aspartate (Asp) and glutamate (glu) B. Lysine (Lys) and arginine (Arg) C. Phenylalanine (Phe), tyrosine (Tyr), and tryptophan (Trp) D. Methionine (Met) and glycine (Gly) E. None of the above 4. Chymotrypsin hydrolyzes peptide bonds specifically at what amino acid residues? Use the choices for question # 3. C 5. Cyanogen bromide cleaves peptide bonds specifically at what residues? Use the choices for question # 3. E 6. Fetal hemoglobin (HbF) binds oxygen with ____ normal adult hemoglobin (HbA). A. Lower affinity than B. Higher affinity than C. The same affinity as 7. A molecule of normal adult hemoglobin contains how many polypeptide chains? A. Zero D. 3 B. 1 E. 4 C. 2 F. 5 8. How many heme (iron-protoporphyrin IX) molecules are bound to one molecule of normal adult hemoglobin? Use the choices for question # 7. E 9. Which of the following proteins has little tertiary structure and no quarternary structure? A. Hemoglobin D. Insulin B. Myoglobin E. Aspartame C. Keratin 10. Which of the proteins of question # 9 is a compact, globular protein without quarternary structure? B
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This note was uploaded on 05/06/2008 for the course BCHM 2024 taught by Professor Keenan during the Spring '08 term at Virginia Tech.

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Exam 1 Key 2008 - Page 1 of 4 Name Student number BCHM 2024 Examination 1 1 The pH of pure water at 25o C is 7.00 What is the hydrogen ion(H

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