CAPE Biology Unit 1 · 2004 · Paper 2

40 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)5 marksOn the line next to EACH of the photographs, indicate whether the fluid bathing the cell is isotonic, hypertonic or hypotonic.
2. 1(a)(ii)1 markOn the line next to EACH of the photographs, indicate whether the fluid bathing the cell is isotonic, hypertonic or hypotonic.
3. 1(a)(iii)1 markOn the line next to EACH of the photographs, indicate whether the fluid bathing the cell is isotonic, hypertonic or hypotonic.
4. 1(a)(iv)1 markOn the line next to EACH of the photographs, indicate whether the fluid bathing the cell is isotonic, hypertonic or hypotonic.
5. 1(a)(v)1 markOn the line next to EACH of the photographs, indicate whether the fluid bathing the cell is isotonic, hypertonic or hypotonic.
6. 1(b)(i)1 markSuggest why the sizes of the red blood cells in photographs 1 – 3 change.
7. 1(b)(ii)1 markSuggest why the sizes of the plant cells in photographs 4 – 5 do not change.
8. 1(c)1 markCalculate the increase in size of red blood cells in photograph 3 over those in photograph 1.
9. 1(d)1 markWhen plant cells appear as in photograph 5, what is the specific name given to this condition?
10. 1(e)1 markName THREE processes by which water and solutes can enter into a living plant or animal cell.
11. 2(a)3 marksIdentify the structures labelled A to F in Figure 3.
12. 2(b)4 marksIn the space provided below, draw a plan diagram to show the distribution of the different types of tissues in Box A in Figure 3. Make your drawing TWO TIMES the size of Box A. (No labels required).
13. 2(c)1 markThe photograph in Figure 3 has been magnified 150 times. What is the ACTUAL width of the specimen, from X1 to X2.
14. 2(d)2 marksFigure 4 is a diagram of pollen grain 'P' shown on Figure 3. Draw and label the nucleus/nuclei in the correct location in the cell.
15. 3(a)3 marksIn the space below, using appropriate symbols for these characteristics, set out the genetic cross which produces the F₁ plants.
16. 3(b)(i)4 marksComplete Table 1 to determine the probability that the differences between the observed and expected results are due to chance.
17. 3(b)(ii)1 markx² is calculated from the formula Σ (O - E)² / E. Determine the value of x² from the data in Table 1. Use Table 2 to select the critical x² value.
18. 3(c)(i)1 markState the critical value of x² from Table 2.
19. 3(c)(ii)1 markDo your results imply a significant or insignificant difference between the observed and expected results?
20. 4(a)10 marksGive a detailed and precise description of the structures of the cell membrane.
21. 4(b)(i)4 marksCompare the membrane systems of the rough endoplasmic reticulum with Golgi membranes.
22. 4(b)(ii)6 marksCompare the membrane systems of chloroplasts with mitochondria.
23. 5(a)(i)10 marksUsing graphs and/or suitable examples, describe the effect of the following conditions on enzymes and enzymatic activity: Temperature.
24. 5(a)(ii)1 markUsing graphs and/or suitable examples, describe the effect of the following conditions on enzymes and enzymatic activity: pH.
25. 5(a)(iii)1 markUsing graphs and/or suitable examples, describe the effect of the following conditions on enzymes and enzymatic activity: Enzyme concentration and substrate concentration.
26. 5(b)6 marksDiscuss how the above named enzymes exhibit substrate or bond specificity and why they become inactive when boiled.
27. 5(c)4 marksDiscuss the regulation that is occurring in the metabolic pathway described.
28. 6(a)10 marksDescribe the structure and function of the male reproductive system. An annotated diagram may be used.
29. 6(b)5 marksWith reference to the menstrual cycle, discuss how these pills exert their effect.
30. 6(c)5 marksCompare the structures of the egg and sperm. Relate the structural adaptations of the sperm to its ability to carry out digestion, use energy and move.
31. 7(a)10 marksUsing annotated diagrams only, give an account of the process of meiosis, from Prophase I to Telophase I.
32. 7(b)6 marksDescribe THREE ways in which such variation is made possible during meiosis.
33. 7(c)4 marksWhat type of division is used in asexual reproduction? State TWO advantages and TWO disadvantages of the role of this method of cell division in vegetative propogation.
34. 8(a)10 marksExplain how in situ and ex situ conservation methods can be used to maintain biodiversity.
35. 8(b)5 marksDiscuss the importance of maintaining genetic diversity in plant and animal populations.
36. 8(c)5 marksOutline FIVE ecological factors that should be evaluated before determining the size and location of reserves?
37. 9(a)(i)2 marksExplain how changes in the genetic content of cells may be due to failure of chromosomes to separate.
38. 9(a)(ii)8 marksExplain how changes in the genetic content of cells may be due to structural changes of the chromosomes. Use diagrams to illustrate your answer to (a)(ii).
39. 9(b)(i)6 marksDiscuss the principles on which the Five Kingdom system is based.
40. 9(b)(ii)4 marksComment on the difficulties of classifying members of the Proctoctista (Protist Kingdom).