CAPE Biology Unit 1 · 2010 · Paper 2

32 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 marksList FOUR main functions of proteins in living organisms.
2. 1(a)(ii)1 markCircle a peptide bond in the structure in Figure 1.
3. 1(a)(iii)2 marksIn the boxes below, draw the structure of a) an amino group and b) a carboxyl group.
4. 1(b)(i)2 marksEnzymes have many properties. State ONE property of enzymes that relates to their structure and ONE property that relates to their MAIN function in the cell.
5. 1(b)(ii)2 marksOn the graph in Figure 2, sketch TWO curves to represent the progress of a reaction with and without the presence of an enzyme.
6. 1(c)(i)2 marksDescribe the trend seen in EACH graph. Graph A: Graph B:
7. 1(c)(ii)4 marksSuggest the type of inhibition represented by the data in EACH graph and state the reason for your answer. Graph A: Graph B:
8. 2(a)6 marksIdentify the stage of mitosis seen in the diagrammatic representation of the cells labelled A, B and C. State ONE characteristic feature of EACH of the stages identified. A B C
9. 2(b)3 marksIn the cell outline below, draw the arrangement of the chromosomes of a cell with a diploid chromosome number of 4 during metaphase 1 of meiosis.
10. 2(c)3 marksComplete Table 1 to identify the key differences between the processes mitosis and meiosis.
11. 2(d)(i)2 marksName the process which chromosomes must undergo prior to nuclear division and state at what stage of the cell cycle this takes place. Process Stage
12. 2(d)(ii)1 markState ONE reason why the process named in (d)(i) is necessary.
13. 3(a)(i)2 marksIdentify the structures labelled I, II, III and IV. I II III IV
14. 3(a)(ii)1 markState the ploidy of the nucleus of the cell shown in Figure 5.
15. 3(a)(iii)2 marksState TWO reasons why a large number of mitochondria is present in the sperm cell.
16. 3(a)(iv)2 marksIn Figure 5, the acrosome of the male sperm is an organelle. Name the type of organelle and describe its function.
17. 3(a)(v)1 markState the name given to the ovum as it is released from the ovary.
18. 3(a)(vi)4 marksIn the box below, draw and annotate the structure of the ovum as it is released from the ovary.
19. 3(b)2 marksComplete Table 2 by inserting yes or no, to identify the key differences between the ovum and the sperm.
20. 3(c)1 markState ONE similarity between the ovum and the sperm.
21. 4(a)(i)5 marksName FIVE chemical components in the structure of cell membranes and state the function of EACH component named.
22. 4(a)(ii)2 marksIdentify the chemical component of cell membranes that enables facilitated diffusion to occur, and explain how this occurs.
23. 4(b)(i)2 marksDistinguish between the terms 'prokaryotic' and 'eukaryotic'.
24. 4(b)(ii)6 marksExplain how prokaryotes and eukaryotes differ with respect to genetic material, protein synthesis and photosynthetic structures.
25. 5(a)(i)3 marksSexual reproduction greatly increases the genetic variation in a population. Define 'genetic variation' and describe TWO sources of variation in sexually reproducing organisms.
26. 5(a)(ii)2 marksDefine 'mutation' and state in which cells of the organism mutations occur.
27. 5(a)(iii)4 marks"A gene mutation which is the result of a deletion may be more harmful than a mutation resulting from the substitution of one base." Discuss this statement using relevant facts and information.
28. 5(b)(i)2 marksExplain the role of 'restriction enzymes' in bacterial cells.
29. 5(b)(ii)4 marksComment on the role of restriction enzymes in genetic engineering.
30. 6(a)6 marksDefine the term 'pollination' and describe the sequence of events from pollination to fertilization.
31. 6(b)3 marksExplain the term 'double fertilization' and briefly discuss the significance of the process.
32. 6(c)6 marksDiscuss the importance of the changes which occur following fertilization, making reference to changes in the zygote, endosperm, the ovule and ovary.