CAPE Biology Unit 1 · 2012 · Paper 2

27 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)3 marksComplete Table 1 by writing the missing information in the spaces provided.
2. 1(b)5 marksOn the grid provided on page 3, plot the data in Table 2 as a line graph.
3. 1(b)(ii)3 marksAccount for the shape of the graph. Include in your account a brief description of the shape of the graph.
4. 1(c)2 marksIdentify the structures labelled A and B in Figure 1.
5. 1(c)(ii)1 markLabel an ester linkage in the triglyceride shown in Figure 1.
6. 1(c)(iii)1 markState ONE feature of the triglyceride molecule that enables it to function as a better energy store than carbohydrates.
7. 2(a)(i)6 marksGive a concise description of the events occurring at the steps labelled 1, 2 and 3 in Figure 2.
8. 2(a)(ii)2 marksDNA replication is regarded as being semi-conservative. Comment on the significance of this method of replication.
9. 2(b)(i)4 marksWith reference to average beak depth (indicated by the broken line in Figure 3) and nature of the frequency distributions of the two populations, determine what effect the drought had on the finch populations. Quote…
10. 2(b)(ii)3 marksWith the aid of a simple diagram, comment on the type of selection illustrated by the data shown in Figure 3.
11. 3(a)(i)2 marksComplete Figure 4 to show the missing stages in the boxes labelled A and B.
12. 3(a)(ii)1 markUse an arrow labelled C to indicate on Figure 4 where meiosis occurs during the development of the embryo sac.
13. 3(a)(iii)1 markUse an arrow labelled D to indicate the location of the female gamete on Figure 4.
14. 3(a)(iv)4 marksAngiosperms and mammals both produce haploid gametes. Comment on TWO OTHER ways in which sexual reproduction in angiosperms and mammals may be similar.
15. 3(b)(i)5 marksIdentify the structures labelled A, B, C, D, and E in Figure 5.
16. 3(b)(ii)2 marksComment on the MAIN function of the structure labelled E.
17. 4(a)(i)6 marksDescribe THREE structures which are common to a mitochondrion and a chloroplast.
18. 4(a)(ii)4 marksDiscuss how a mitochondrion differs from a chloroplast with respect to their MAIN function in a cell.
19. 4(b)5 marksExplain, using the dicotyledonous root as an example, the difference between a 'tissue' and an 'organ'.
20. 5(a)(i)4 marksDistinguish between the terms ‘gene mutation' and ‘chromosome mutation'.
21. 5(a)(ii)5 marksUsing sickle-cell anaemia as the example, explain the sequence of changes triggered by the gene mutation that leads to the cells becoming sickle shaped.
22. 5(b)(i)4 marksOutline the procedure of somatic gene therapy, giving FOUR key steps.
23. 5(b)(ii)2 marksWith reference to cystic fibrosis, comment on ONE difficulty in using gene therapy to treat diseases.
24. 6(a)(i)4 marksDistinguish between ‘binary fission' and 'budding'.
25. 6(a)(ii)4 marksDiscuss ONE advantage and ONE disadvantage of asexual reproduction.
26. 6(b)(i)5 marksOutline the sequence of events that leads from germination of a pollen grain to double fertilization in flowering plants.
27. 6(b)(ii)2 marksBriefly comment on the significance of double fertilization in the life cycle of a flowering plant.