MULTIPLE CHOICE
1. c
2. e
3. e
4. e
5. d
6. e
7. c
8. a
9. b
10. d
11. c
12. a
13. e
14. b
15. e
16. b
17. d
18. e
19. c
20. b
21. d
22. d
23. b
24. d
25. a
26. c
27. d

SHORT ANSWER
28. makes the RNA primer
29. poly (A) tail
30. tryptophan
31. no- it's single stranded
32. it identifies the initiation site
33. cis
34. terminates transcription
35. histones or non-histones
36. replicon
37. & 38. carboxyl & amino
39. euchromatin
40. & extra credit:  accumulation of toxic by-product 
(as in PKU) or missing the end product (as in albinism).

LAC OPERON QUESTIONS
41. 	-	+
42. 	+ 	+
43. 	-	+
44. 	-	+
45. 	-	+

DNA STRUCTURE
46. RNA
47. cytosine
48. pyrimidine
49. see Figure 9.7
50. cytosine binds with guanine.  however, if you got #47 
wrong, I gave you credit on question #50 if you put down the
base that pairs with your answer in #47.