Introductory Biochemistry

Practice_Final_Answers.docx-BIOCH 200 Practice Final - Answers

Protein_Structure_MCQ_Answers_Winter_2015.doc-Answers to Practice Exam Questions: Amino

Protein_Function_MCQ_Winter_2015_2.doc-Practice Exam Questions: Protein Function 1.

University of Alberta Department of Biochemistry Name: ______________________________ ID#: ______________________________ SPECIAL CODE 111 MWF 9am Dr. Parrish 221 MWF noon Dr. Wright 331 TT 11am Dr. Milner and A. Locke BIOCH 200 Midterm Examination Thursday February 12 th 2015 Time Limit: 90 minutes If this examination booklet is NOT returned, you will be assigned a mark of ZERO (0) for this midterm. IF YOU CONTINUE WRITING THIS EXAM AFTER THE ALLOTTED TIME YOU WILL BE GIVEN A SCORE OF ZERO INSTRUCTIONS 1. CLEARLY ENTER YOUR NAME AND I.D.# ON THE ANSWER SHEET PROVIDED. 2. USE HB PENCIL ONLY AND MAKE HEAVY BLACK MARKS THAT FILL THE CIRCLE COMPLETELY. 3. CHOOSE THE ONE BEST ANSWER TO EACH QUESTION. 1 1 4. THERE ARE 65 QUESTIONS IN THIS EXAM. 5. CHECK THAT YOU HAVE 20 PAGES IN THIS EXAM, AND 1 ANSWER SHEET. 2 2 Consider the above figure for questions 1 through 5. 1. Which of these molecule(s) contains at least 1 phosphoester bond? A. 2 B. 3 C. 2 and 4 D. 1, 2, and 4 E. 1, 2, 3 and 4 2. Which of the molecules shown in the figure is/are a nucleoside? A. 1 B. 5 C. 2 and 4 D. 1, 2 and 4 E. 1, 2, 3 and 4 HO 5 1 H 2 3 4 6 3 3 3. Which of the molecules shown in the figure on the previous page does NOT contain a pyrimidine base? A. 1 and 3 B. 2 and 3 C. 1, 2 and 3 D. 4, 5 and 6 E. 1, 4, 5 and 6 4. Which is TRUE about molecule # 5 in the figure shown on page 2? A. Its base is not commonly found in DNA. B. It contains a pyrimidine base. C. It contains the sugar deoxyribose. D. Its name is guanosine. E. B and C 5. How many chiral carbon atoms does molecule #4 contain? A. 0 B. 3 C. 4 D. 5 E. 10 6. How many hydrogen bonds can the substituent (group) on atom C5 of thymidine potentially form? A. 0 B. 1 C. 2 D. 3 E. 4 7. Denaturation of proteins involves breaking peptide bonds. A. True B. False 4 4 C. 8. Rank the amino acids below according to their hydrophobicity, starting from the most hydrophobic to the least hydrophobic. Tyr; Phe; Asn A. Asn > Phe > Tyr B. Phe > Tyr > Asn C. Tyr > Asn > Phe D. Tyr > Phe > Asn E. Asn > Tyr > Phe 9. Which of the following is TRUE about the distal histidine of myoglobin? A. It forms a strong bond with the Fe 2+ atom coordinated by heme. B. It prevents helix F from moving in response to oxygen binding. C. It forms a hydrogen bond with bound oxygen. D. It covalently binds heme into the myoglobin subunit. E. A and D are both true. 10. How many ionizable groups does an Asn residue at the N-terminal end of a polypeptide chain contain? A. 0 B. 1 C. 2 D. 3 11. Which of the following statements regarding amino acids is/are FALSE? A. Asparagine can act as both a H-bond donor and acceptor with water. B. Every free amino acid has at least two pKa values. C. When the pH of a solution is below the pKa value of an ionizable group, the deprotonated form of that group predominates. D. Statements B and C are false. 5 5

BIOCH | 200 | Introductory Biochemistry | exam | University of Alberta Departme

Exams 111, 221 and 331 C B D D E A E A D C C C D A B A E C E C B C B B B B C C D E D A E C B B * E E A The following items have additional keyed responses: ITEM RSP 32 C Exams 112, 222 and 332 E B C D A E A C D C B C C D D D B A C A E C E C B B B B B B C E E E D A A E C * The following items have additional keyed responses: ITEM RSP 37 C

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