CAPE Biology Unit 2 · 2006 · Paper 2

47 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)1 markWith reference to the graph in Figure 1, determine which fertilizer regimen gives the HIGHEST yield of rice.
2. 1(b)1 markCalculate the percentage increase in yield when the amount of Azolla is doubled from 7 t to 14 t as the sole fertilizer administered.
3. 1(c)1 markDetermine the difference in rice production, in kg ha⁻¹, between a field treated with urea only at 87 kg ha⁻¹ and one treated with both urea at 43.5 kg ha⁻¹ and Azolla at 14 t ha⁻¹.
4. 1(d)1 markName TWO factors, other than nutrient availability from fertilizer, that would affect rice yield.
5. 1(e)1 markName ONE type of plant compound that requires the functionally useful element in urea.
6. 1(f)1 markSuggest TWO reasons why it is better to use plant or animal manure rather than chemical fertilizers alone for fertilizing crops.
7. 1(g)4 marksIn the box provided, draw and label the cells in region A between the parallel lines shown in Figure 2.
8. 2(a)(i)6 marksUse the grid provided to show the results in Table 1 graphically.
9. 2(a)(ii)2 marksState TWO differences between the peaks in A and B.
10. 2(a)(iii)1 markState ONE cause of the differences between the membrane potentials reached in A and B.
11. 2(b)1 markOn the diagram in Figure 3, complete the labelling of the nerve cell.
12. 3(a)1 markName the type of therapy that the child is undergoing.
13. 3(b)1 markIdentify the type of enzymes used to remove the normal allele from the genome of the donor whose genes are being used in the treatment.
14. 3(c)2 marksSuggest ONE benefit and ONE hazard of the technique shown in Figure 4.
15. 3(d)2 marksCan the change in the genome be passed on to the individual's offspring? Give ONE reason for your answer.
16. 3(e)(i)2 marksBriefly outline a method of detection and what you would observe if E. coli has taken up no DNA.
17. 3(e)(ii)2 marksBriefly outline a method of detection and what you would observe if E. coli has taken up recombinant DNA.
18. 4(a)(i)4 marksClarify the actions and purposes of the oxidative and decarboxylative reactions which occur in the mitochondria during the entry and processing of pyruvic acid.
19. 4(a)(ii)6 marksClarify the actions and purposes of the oxidative and decarboxylative reactions which occur in the mitochondria during the rotation of the Krebs cycle.
20. 4(b)10 marksWith the aid of a diagram, give an account of the process of oxidative phosphorylation (the electron transport chain), to show the roles of hydrogen and electron carriers, phosphate compounds and oxygen in the…
21. 5(a)(i)1 markDefine the term: Ecosystem.
22. 5(a)(ii)1 markDefine the term: Habitat.
23. 5(a)(iii)1 markDefine the term: Ecological niche.
24. 5(a)(iv)1 markDefine the term: Food chain.
25. 5(b)4 marksDiscuss how the components in an ecosystem function to achieve and maintain ecological balance.
26. 5(c)(i)3 marksExplain why the flow of energy through ecosystems is linear and NOT cyclical.
27. 5(c)(ii)3 marksExplain why food chains are generally limited to three or four links.
28. 5(d)6 marksDescribe the tree ecosystem in terms of: a pyramid of biomass, a pyramid of numbers, and a pyramid of energy.
29. 6(a)(i)2 marksDefine the term Homeostasis and exemplify it with reference to the glucose concentration of the blood and the endocrine-related actions of the pancreas and/or the liver.
30. 6(a)(ii)2 marksDefine the term Set point and exemplify it with reference to blood glucose concentration and pancreatic/liver function.
31. 6(a)(iii)3 marksDefine the term Detectors and exemplify it with reference to blood glucose concentration and the endocrine actions of the pancreas and/or liver.
32. 6(a)(iv)3 marksDefine the term Regulators and exemplify it with reference to blood glucose concentration and pancreatic/liver action.
33. 6(b)10 marksWhat reactions does the liver perform on protein material to process it to the body's advantage?
34. 7(a)10 marksDescribe the ascent of water in plants from outside the root to the intercellular spaces of the leaf. Include the role of root pressure, capillarity, cohesion, adhesion, transpiration pull and stomata.
35. 7(b)4 marksRelate the structure of xylem vessels to their function.
36. 7(c)6 marksDiscuss the effects these conditions would have on water uptake, mineral ion transport, and transpiration.
37. 8(a)(i)2 marksDescribe the mode of action of phagocytes.
38. 8(a)(ii)2 marksDescribe the mode of action of plasma cells.
39. 8(b)6 marksDistinguish between B and T lymphocytes in relation to their origin and maturation process.
40. 8(c)4 marksWhat convincing points could Chloe make to explain why the test is accurate and based on sound technology?
41. 8(d)6 marksActive artificial immunity and passive artificial immunity are two methods of controlling disease. Compare TWO situations in which EACH of these methods is used to BEST advantage, giving examples to support your…
42. 9(a)(i)2 marksUsing appropriate examples, recommend the appropriate diet for a lactating mother.
43. 9(a)(ii)2 marksUsing appropriate examples, recommend the appropriate diet for sedentary grandparents.
44. 9(a)(iii)2 marksUsing appropriate examples, recommend the appropriate diet for an agricultural labourer.
45. 9(b)(i)4 marksFor HIV/AIDS and diabetes, state the disease categories under which EACH falls.
46. 9(b)(ii)5 marksDiscuss reasons for the global distribution of HIV/AIDS and diabetes.
47. 9(c)5 marksWith reference to the meaning of the term 'healthy', explain why the doctor considers Betty to be malnourished.