CAPE Biology Unit 2 · 2013 · Paper 2

31 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)1 markState the region of the cell where glycolysis takes place.
2. 1(a)(ii)2 marksDescribe what occurs at each of the stages labelled 1, 2, 3 and 4 in Figure 1.
3. 1(a)(iii)2 marksSuggest the significance of the pathway shown in Figure 1.
4. 1(b)(i)a)1 markIdentify which reservoir contains organic materials that are available as nutrients.
5. 1(b)(i)b)1 markIdentify which reservoir contains inorganic materials that are unavailable as nutrients.
6. 1(b)(ii)3 marksName the processes represented by arrows 1, 2 and 3 in Figure 2 involved in transferring nutrients between reservoirs.
7. 1(b)(iii)1 markUsing an arrow and the letter M, indicate on Figure 2 where the activity of mycorrhizal fungi dissolving minerals fits into the nutrient cycling model.
8. 1(c)(i)2 marksUse labelled double-headed arrows (↔) directly on the graph in Figure 3 to indicate the region where: a) light is a limiting factor b) other factors become limiting.
9. 1(c)(ii)2 marksExplain the significance of points D and E on the axes of the graph in Figure 3.
10. 2(a)(i)5 marksMake a detailed drawing of the region highlighted inside the box in Figure 4, at the actual size shown.
11. 2(a)(ii)2 marksIdentify the structures indicated by labels I, II, III, and IV in Figure 4.
12. 2(b)(i)2 marksDistinguish between systolic and diastolic blood pressure.
13. 2(b)(ii)4 marksDescribe the overall trends in systolic and diastolic blood pressure with increasing age in the population shown in Figure 5.
14. 2(b)(iii)2 marksState what deduction can be made regarding the relationship between gender and blood pressure from Figure 5.
15. 3(a)(i)6 marksConstruct a histogram (comparative bar chart) of mortality rates for both men and women across the cancer types given in Table 1 on the grid provided on page 11.
16. 3(a)(ii)3 marksBased on Table 1, comment on the leading cause of cancer mortality for men, for women, and for both sexes combined, quoting the mortality rate in each case.
17. 3(b)(i)2 marksDefine the term 'VO2 max'.
18. 3(b)(ii)2 marksExplain the plateau observed in the graph after reaching the VO2 max point.
19. 3(b)(iii)2 marksState two factors that affect VO2 max, explaining briefly how each factor influences its value.
20. 4(a)(i)2 marksExplain the concept of 'biodiversity'.
21. 4(a)(ii)6 marksDiscuss why biodiversity loss is a major concern, citing one direct benefit and two indirect benefits of maintaining biodiversity.
22. 4(b)(i)4 marksDistinguish between in situ and ex situ conservation of biodiversity, giving one example of each method.
23. 4(b)(ii)3 marksBriefly comment on three limitations of using ex situ conservation methods to maintain biodiversity.
24. 5(a)(i)2 marksGive a brief explanation of the concept of 'homeostasis'.
25. 5(a)(ii)6 marksDiscuss the roles of a receptor, a set point, and an effector in a homeostatic system.
26. 5(b)(i)4 marksBriefly describe the structure of a collecting duct and explain its role in kidney function.
27. 5(b)(ii)3 marksExplain how antidiuretic hormone (ADH) regulates the function of collecting ducts.
28. 6(a)4 marksComment on two major effects of cigarette smoking on the cardiovascular system of heavy smokers.
29. 6(b)(i)3 marksDescribe the origin and maturation of T lymphocytes.
30. 6(b)(ii)6 marksState three types of T-cells and outline the main function of each type.
31. 6(b)(iii)2 marksWith reference to HIV, explain why T-cells are sometimes unable to effectively eliminate foreign organisms.