CAPE Biology Unit 2 · 2010 · Paper 2

30 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)4 marksIn the space provided, make an annotated schematic drawing of a chloroplast.
2. 1(a)(ii)4 marksIdentify and describe the TWO parts of the chloroplast that are important in the process of photosynthesis.
3. 1(b)(i)3 marksIdentify the processes in Figure 1 represented by the letters A, B, C, D, E and F.
4. 1(b)(ii)2 marksDescribe TWO NATURAL ways by which nitrogen is lost from soil ecosystems.
5. 1(b)(iii)2 marksDescribe TWO human activities which impact the nitrogen cycle.
6. 2(a)(i)4 marksExplain FOUR precautions that should be taken when setting up and conducting this experiment.
7. 2(a)(ii)1 markFrom which leaf surface will the water loss most likely be GREATER?
8. 2(a)(iii)1 markSuggest an appropriate control for the experiment.
9. 2(b)3 marksIdentify THREE factors that affect the closing and opening of stomata, and explain how these factors function.
10. 2(c)(i)1 markIdentify the structures labelled X and Y in Figure 3.
11. 2(c)(ii)4 marksDiscuss TWO structural differences between the cells labelled X and Y and describe how, in spite of these differences, they function as a unit.
12. 2(c)(iii)1 markName ONE route by which substances move from the chloroplast in leaves to the phloem.
13. 3(a)(i)1 markDefine the term 'health'.
14. 3(a)(ii)3 marksDifferentiate between EACH of the categories of disease listed with respect to the cause of the diseases: physical and mental; infectious and non-infectious; deficiency and inherited.
15. 3(a)(iii)3 marksExplain the difficulty in classifying protein-energy malnutrition as a non-infectious, physical, deficiency disease.
16. 3(b)(i)4 marksDiscuss the curves for laryngeal and lung cancer, and breast cancer.
17. 3(b)(ii)2 marksSuggest TWO reasons for the difference in the shapes of the curves.
18. 3(b)(iii)2 marksOutline TWO challenges that health authorities in the Caribbean may face in reversing the trends for laryngeal and lung cancer.
19. 4(a)(i)4 marksExplain what is meant by the term 'glycolysis' and state where it takes place in the cell.
20. 4(a)(ii)4 marksAerobic respiration is represented by C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O. Discuss FOUR reasons why this equation does NOT fully represent respiration.
21. 4(b)3 marksExplain the role of chlorophyll in photosynthesis.
22. 4(c)4 marksComment on the significance of ATP and NADPH2 in photosynthesis.
23. 5(a)(i)5 marksUse an annotated diagram ONLY to describe the structure of a motor neurone.
24. 5(a)(ii)4 marksA farmer has been exposed to an insecticide that inhibits the enzymatic breakdown of acetylcholine. Explain why this causes muscular twitching and spasms in the farmer.
25. 5(b)(i)2 marksOutline TWO differences between hormonal and nervous control in animals.
26. 5(b)(ii)4 marksWith reference to diabetes mellitus, explain TWO ways in which a malfunction in hormone activity could lead to disease.
27. 6(a)4 marksDefine the term 'immune response' and distinguish between cell-mediated and humoral immune responses.
28. 6(b)4 marksDiscuss the maturation of B and T cells in relation to their specific roles.
29. 6(c)3 marksComment on the use of monoclonal antibodies in home pregnancy tests.
30. 6(d)4 marksExplain the difference between active artificial immunity and passive artificial immunity.