CSEC Biology · January 2014 · 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)4 marksComplete Figure 1 by identifying the materials that EACH jar should contain.
2. 1(a)(ii)1 markWhat is the expected observation in Jar IV?
3. 1(b)(i)2 marksDescribe how the apparatus in Figure 1 is modified to test the hypothesis that plants produce carbon dioxide during aerobic respiration.
4. 1(b)(ii)2 marksExplain the function of the black cloth in the experiment.
5. 1(b)(iii)2 marksSuggest TWO precautions that should be taken when conducting this experiment.
6. 1(c)(i)2 marksWrite a chemical equation to summarize aerobic respiration.
7. 1(c)(ii)2 marksExplain the importance of aerobic respiration to living organisms.
8. 1(d)2 marksIn certain microorganisms, respiration occurs anaerobically. State the end products of anaerobic respiration.
9. 1(e)8 marksComplete Table 1 to distinguish between photosynthesis and aerobic respiration.
10. 2(a)(i)4 marksName the structures labelled A, B, C and D shown in Figure 2.
11. 2(a)(ii)1 markMelanin is a pigment that protects the skin from damage by UV light. Which structure in Figure 2 has the LARGEST quantities of this pigment?
12. 2(b)(i)a)3 marksState what is meant by EACH of the following terms: Allele
13. 2(b)(i)b)3 marksState what is meant by EACH of the following terms: Genotype
14. 2(b)(i)c)3 marksState what is meant by EACH of the following terms: Phenotype
15. 2(b)(ii)6 marksUsing a genetic diagram, explain how two non-albino parents could produce an albino offspring.
16. 2(b)(iii)1 markSuggest the genotypes of parents who will never have albino children.
17. 3(a)(i)2 marksIndicate on EACH flower in Figure 3, the parts that give rise to the male gametes. Use a label line and the letter, M.
18. 3(a)(ii)2 marksSuggest the agent of pollination for EACH flower. X Y
19. 3(a)(iii)4 marksWhat TWO features of EACH flower make them suited for the type of pollinating agent suggested in (ii) above? X Y
20. 3(b)5 marksDescribe the sequence of events which takes place after pollination to give rise to a fruit.
21. 3(c)2 marksSuggest TWO methods of dispersal of the seeds found inside this fruit.
22. 4(a)(i)6 marksUse labelled diagrams to show the structures of a generalized plant cell and a generalized animal cell.
23. 4(a)(ii)4 marksName TWO organelles which are unique to plant cells and suggest the significance of these organelles to the survival of the plant.
24. 4(b)(i)3 marksExplain the effect this would most likely have on EACH cell.
25. 4(b)(ii)2 marksExplain how the process responsible for the results in (b) (i) differs from the process by which gases move in and out of leaf cells.
26. 5(a)(i)4 marksDraw a simplified labelled diagram of the nitrogen cycle to show THREE processes that involve bacteria and ONE process that does not involve bacteria.
27. 5(a)(ii)2 marksState TWO consequences of nitrogen deficiency in plants.
28. 5(b)(i)3 marksExplain how excess nitrate fertilizer may be responsible for the overgrowth of algae and death of the aquatic organisms.
29. 5(b)(ii)6 marksDiscuss THREE ways in which this problem could be remedied.
30. 6(a)6 marksWith the aid of an annotated diagram, describe the functions of the enamel, dentine and pulp of a named tooth.
31. 6(b)3 marksSuggest THREE ways having a varied diet is beneficial to a mammal.
32. 6(c)6 marksExplain how this might affect his ability to digest food and suggest how he could obtain the essential nutrients that his body requires.