bmb_526_exam_1a__2004

bmb_526_exam_1a__2004 - BMB 526 Midterm Exam 1 You may use...

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BMB 526 Midterm Exam 1 November 15, 2004 You may use this grid to record your answers for comparison with the posted answer keys. The information provided below may be useful in answering some questions. Version of the Exam: 1A 1. 8. 15. 22. 29. 2. 9. 16. 23. 30. 3. 10. 17. 24. 31. 4. 11. 18. 25. 32. 5. 12. 19. 26. 33. 6. 13. 20. 27. 34. 7. 14. 21. 28. 35. The "Wobble" Rules of Codon-Anticodon Pairing 5 Ν Nucleotid e of Anticodon 3 Ν Nucleotide of Codon C G A U U A or G G C or U I U, C, or A 3 Ν Nucleotide of Codon 5 Ν e of Anticodon G C, U A I, U C I, G U I, G, A Second position First position Third position (3 Ν end) U C (5 Ν end) A G Ser Phe Tyr Cys U Ser Ser Ser Phe Leu Leu Tyr Stop Stop Cys Stop Trp C A G U Leu Pro His Arg U Leu Leu Leu Pro Pro Pro His Gln Gln Arg Arg Arg C A G C Asn Thr Ile Ser U Asn Lys Lys Thr Thr Thr Ile Ile Met Ser Arg Arg C A G A Val Ala Asp Gly U Val Val Val Ala Ala Ala Asp Glu Glu Gly Gly Gly C A G G
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BMB 526 – Midterm Exam – November 15, 2004 Name (print clearly) ________________________ C O M C H M ( c i r c l e o n e ) BEFORE you begin the exam, please complete the following information on your response sheet: (a) your name and signature (b) your student number (PID) (c) your college – in the area under SECTION : mark 001 for CHM student m a r k 002 for COM student (d) your version of the exam is 1A — mark this in the area under FORM This exam comprises 35 multiple choice questions. For each question, please mark the letter on the “bubble sheet” that corresponds to the best available answer. When you leave the exam room, please turn in your RESPONSE SHEET and your EXAM to the instructor. Once you exit the exam room, please DO NOT re-enter until the end of the exam period. You have 60 minutes to complete this exam. Do well and good luck.
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1A-3 1. The table below describes the lengths and nucleotide content of several DNA fragments. Which of these DNAs would have the lowest melting temperature (Tm)? DNA Fragment Length (bp) (G + C) content A 1800 42% B 3200 55% C 4500 38% D 7800 51% 2. The major and minor grooves in the structure of double-helical DNA arise because: A. A+T basepairs take more space than do G+C basepairs. B. the distance between one basepair and the next (above or below) can vary. C. the phosphoribose backbones are not directly opposite in the helix. D. the bases are not equidistant from the 5’ and 3’ carbons of ribose. E. the negatively charged phosphates on the two backbones repel each other. 3. The genetic code is said to be degenerate, which means that: A. the genetic code doesn’t work the same for all organisms. B. mutations can affect which amino acid is specified by a particular codon. C. a given codon might specify several different amino acids. D. a given amino acid might be specified by several different codons. E. several different amino acids might be carried by the same tRNA.
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This note was uploaded on 07/25/2008 for the course BMB 526 taught by Professor Wang during the Fall '06 term at Michigan State University.

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bmb_526_exam_1a__2004 - BMB 526 Midterm Exam 1 You may use...

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