BMB526Exam2-06 - 1A - Page 1 BMB 526 - Exam II November 29,...

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1A - Page 1 BMB 526 - Exam II November 29, 2006 You may use this grid to record your answers for comparison with the posted answer keys. 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. _____
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1A - Page 2 BMB 526 Exam II - November 29, 2006 NAME (print clearly) ___________________________________ CHM COM (circle one) 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 mark 002 for COM student (d) your version of the exam is 1A --- mark this in the area under FORM This exam contains 34 questions. For each question, please mark the letter on the response 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 proctors. Once you exit the exam room, please DO NOT re-enter until the end of the exam period. To reduce the noise entering the exam room, please do not remain in the hall outside the exam room. Answer Keys will be posted at the Angel website following the exam. You have 65 minutes to complete this exam. Do well and good luck.
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1A - Page 3 1) In regulating gene expression, different sigma factors are used: A. to initiate transcription of different sets of genes. B. to turn on or to turn off expression of the lac operon, depending on the availability of glucose or lactose. C. for each of the three eukaryotic RNA polymerases. D. to bind to different subunits of RNA polymerase. E. to select different 5’-splice sites for alternative splicing events. 2) Which of the following events would occur at the E. coli lac operon when the glucose concentration of the growth medium is low and the lactose concentration is high? A. The lac repressor will bind to the operator sequence. B. Ribosomes will bind to the promoter sequence. C. The transcribed RNA will feedback inhibit the transcription of the structural genes of lac operon by RNA polymerase. D. The CAP protein, bound with cAMP, will recruit RNA polymerase to the promoter. E. An alternative sigma factor will recognize sequences upstream of each open frame (ORF) in the operon. 3) If a mutation occurred in the gene encoding the glucocorticoid receptor, such that the receptor protein no longer could bind zinc atoms, which activity of the receptor would be most directly affected?
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BMB526Exam2-06 - 1A - Page 1 BMB 526 - Exam II November 29,...

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