Answers for test 1 from the library:

1. a                                               28.    d
2. d                                               29.    b
3. e                                               30.    e
4. c                                               31.    a
5. a                                               32.    d
6. d                                               33.    b
7. b                                               34.    e
8. c                                               35.    a
9. c                                               36.    c
10. b                                               37.    a
11. d                                               38.    a
12. b                                               39.    c
13. c                                               40.    b
14. d                                               41.    c
15. d                                               42.    a
16. b                                               43.    a
17. e                                               44.    a
18. a                                               45.    b
19. e                                               46.    b
20. T
21. T                                               47.    neutrons
22. F                                               48.    valence
23. T                                               49.    positive
24. F                                               50.    centrioles
25. T
26. T
27. F