O Level Combined Science past paper questions by topic

1. 1Cells127 written · 33 multiple choice
2. 2Enzymes39 written · 22 multiple choice
3. 3Plant nutrition and transport103 written · 44 multiple choice
4. 4Human nutrition69 written · 37 multiple choice
5. 5Human gas exchange6 written · 23 multiple choice
6. 6Respiration35 written · 19 multiple choice
7. 7Transport in humans78 written · 30 multiple choice
8. 8Drugs and their effects27 written · 18 multiple choice
9. 9Coordination and control15 written · 23 multiple choice
10. 10Development of organisms and continuity of life20 written · 23 multiple choice
11. 11Biotechnology and genetic modification7 written · 9 multiple choice
12. 12Topic 1266 written · 33 multiple choice
13. 13States of matter57 written · 22 multiple choice
14. 14Atoms, elements and compounds148 written · 99 multiple choice
15. 15Stoichiometry45 written · 17 multiple choice
16. 16Chemical energetics22 written · 11 multiple choice
17. 17Chemical reactions100 written · 33 multiple choice
18. 18Acids, bases and salts52 written · 19 multiple choice
19. 19The Periodic Table41 written · 31 multiple choice
20. 20Metals33 written · 43 multiple choice
21. 21Chemistry of the environment17 written · 18 multiple choice
22. 22Organic chemistry55 written · 49 multiple choice
23. 23Motion, forces and energy175 written · 112 multiple choice
24. 24Thermal physics95 written · 20 multiple choice
25. 25Waves52 written · 51 multiple choice
26. 26Electricity138 written · 69 multiple choice
27. 27Nuclear physics29 written · 28 multiple choice

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