CSEC Biology · January 2008 · 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 marksDescribe the reaction rate between points A and B, and between points B and C in Figure 1.
2. 1(a)(ii)1 markWhat is the optimum temperature for the enzyme in this reaction?
3. 1(b)8 marksUsing information in Figure 1, construct in the space provided below, a table to show the data obtained by the student in investigating the rate of enzyme reaction. Your table should contain six rows of data/information.
4. 1(c)(i)7 marksIf the enzyme used in this investigation were amylase, describe fully the method you would use to obtain the data for the graph. Identify the materials and apparatus.
5. 1(c)(ii)1 markIdentify ONE source of error in the investigation.
6. 1(d)(i)1 markWhat process might be taking place to soften the meat?
7. 1(d)(ii)2 marksSuggest why this may be so.
8. 1(e)(i)2 marksSuggest TWO ways in which water helps the process of germination.
9. 1(e)(ii)2 marksApart from water, state TWO environmental conditions needed for germination.
10. 1(f)(i)2 marksName TWO important groups of microorganisms whose activities are influenced by environmental conditions.
11. 1(f)(ii)1 markIdentify ONE cycle which depends on the activities of microorganisms.
12. 1(f)(iii)2 marksExplain the importance of the microorganisms named in (f)(i) in natural cycles.
13. 2(a)6 marksIdentify ONE tube in which, after one hour, the colour of the hydrogen carbonate indicator becomes yellow and ONE in which the solution becomes purple. In each case explain your answer.
14. 3(a)(i)4 marksUsing FOUR arrows ONLY show the direction of flow of blood into and out of the human heart illustrated in Figure 3.
15. 3(a)(ii)2 marksName the blood vessels labelled P and Q respectively.
16. 3(a)(iii)2 marksSome babies are born with a small opening in the wall/septum between the two upper chambers of the heart. Suggest how this condition would affect the functioning of the heart when the atria contract.
17. 3(b)(i)2 marksName TWO substances that the heart muscle cells will receive in this blood supply.
18. 3(b)(ii)1 markIdentify ONE substance found in the blood supply that can cause the walls of the coronary artery to thicken.
19. 3(b)(iii)2 marksHow does the thickening of the coronary arterial wall affect the heart?
20. 3(c)4 marksIdentify TWO types of transport vessels in plants and for EACH identify ONE substance which it transports.
21. 4(a)(i)2 marksName EACH type of cell division illustrated in Figure 4.
22. 4(a)(ii)2 marksIdentify TWO differences between the processes observed in the illustrations in Figure 4.
23. 4(a)(iii)2 marksName TWO specific locations in a plant where EACH type of cell division illustrated in Figure 4 occurs.
24. 4(a)(iv)4 marksGive TWO reasons why BOTH types of cell division are important in the life cycle of a plant.
25. 4(b)(i)1 markWhat is the name given to this process?
26. 4(b)(ii)2 marksSuggest ONE advantage and ONE disadvantage of this process.
27. 4(c)(i)1 markInto what structure will the ovule develop?
28. 4(c)(ii)2 marksName TWO features which will show that the structure you identified at (c)(i) developed from an ovule.
29. 5(a)(i)4 marksName the process carried out by bacteria at EACH of the stages indicated by P, Q, R and S.
30. 5(a)(ii)3 marksExplain how nitrates from the soil become protein in plants and animals.
31. 5(a)(iii)2 marksLeguminous plants have bacteria in their root nodules, which are involved in the nitrogen cycle. The relationship between the legumes and the bacteria is described as mutualistic. Explain why this description is…
32. 5(b)4 marksApart from mutualism, identify TWO OTHER types of relationships that occur among living organisms. Give ONE example of each relationship you identify.