CAPE Biology Unit 1 · 2008 · Paper 2

36 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)2 marksUsing an α-1-6 linkage, attach a third glucose molecule in Figure 1.
2. 1(a)(ii)1 markName ONE example of a carbohydrate that is made up of components with BOTH an α-1-4 glycosidic linkage and an α-1-6 linkage.
3. 1(a)(iii)1 markDistinguish between an 'α glycosidic linkage' and a 'β linkage'.
4. 1(a)(iv)2 marksComment on the difference in function between a carbohydrate with α linkages and a carbohydrate with β linkages.
5. 1(b)(i)2 marksDescribe the α helix bond in keratin.
6. 1(b)(ii)2 marksComment on TWO differences in physical properties of these proteins. Write your answer in the table below.
7. 1(b)(iii)2 marksIdentify the TWO bonds labelled A and B as shown in Figure 2.
8. 1(c)3 marksOutline an experiment to determine experimentally the presence of catalase in chick peas.
9. 2(a)(i)2 marksBriefly outline the role of DNA in genetic inheritance.
10. 2(a)(ii)4 marksDistinguish between the terms 'chromatin' and 'chromosome'.
11. 2(b)3 marksState THREE reasons why mitosis is important in the life cycle of a eukaryotic organism.
12. 2(c)6 marksIn the labelled boxes provided in Figure 3, DRAW three consecutive phases to illustrate the MAIN changes that occur between the two phases shown.
13. 3(a)(i)a)2 marksDraw on the diagram in Figure 4 the ovule.
14. 3(a)(i)b)1 markDraw on the diagram in Figure 4 the path taken by the germinating pollen grain.
15. 3(a)(ii)2 marksOn Figure 4, label TWO features of the embryo sac.
16. 3(a)(iii)2 marksIdentify ONE role for EACH of the features in (ii) above.
17. 3(b)(i)1 markState the term used to describe this reproductive feature.
18. 3(b)(ii)1 markState ONE disadvantage to the plant in having this feature.
19. 3(c)(i)2 marksSuggest TWO mechanisms that occur NATURALLY in plants to aid NON-SEXUAL propagation.
20. 3(c)(ii)1 markState ONE advantage of the mechanisms you identified in (c) (i).
21. 3(d)3 marksDiscuss THREE advantages of these methods over the natural methods of non-sexual propagation.
22. 4(a)(i)2 marksDescribe TWO features of mitochondria and chloroplasts that support the theory that they have evolved from prokaryotic cells.
23. 4(a)(ii)2 marksDefine the term 'symbiosis'.
24. 4(a)(iii)4 marksComment on evidence that supports the theory that a symbiotic relationship existed between eukaryotic cells and chloroplasts and mitochondria. Include in your answer the benefits that BOTH the eukaryotic cells and the…
25. 4(b)(i)2 marksDefine the terms 'tissue' and 'organ'.
26. 4(b)(ii)5 marksUse the dicotyledonous root to distinguish between the levels of organization found in tissues and organs.
27. 5(a)(i)2 marksState ONE definition of a species in terms of breeding behaviour.
28. 5(a)(ii)6 marksDiscuss the limitations of defining a 'species' in terms of breeding.
29. 5(b)(i)4 marksWith reference to animal populations, outline the process by which a new species may arise from a previously existing one.
30. 5(b)(ii)3 marksComment on the basis of this mechanism.
31. 6(a)(i)a)4 marksState the functions of EACH of the following in oogenesis in humans: gonadotrophin releasing hormone.
32. 6(a)(i)b)4 marksState the functions of EACH of the following in oogenesis in humans: luteinising hormone.
33. 6(a)(i)c)4 marksState the functions of EACH of the following in oogenesis in humans: follicle stimulation hormone.
34. 6(a)(ii)3 marksExplain how these hormones function in males as compared to females.
35. 6(b)4 marksComment on why the same principles CANNOT be applied to develop a male hormonal contraceptive.
36. 6(c)4 marksDiscuss TWO significant differences with respect to the timing of oogenesis and spermatogenesis.