CSEC Biology · May/June 2012 · 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 marksConstruct a table to represent the data shown on the graph in Figure 1, using FOUR temperature values from the graph.
2. 1(a)(ii)3 marksDescribe the trend in enzyme activity as shown by the graph in Figure 1.
3. 1(a)(iii)2 marksExplain what happens to the enzyme at temperatures above 37 °C.
4. 1(b)5 marksDesign an experiment to determine the rate at which starch is broken down under different pH conditions.
5. 1(c)(i)2 marksName TWO parts of the human digestive system where amylase may be found.
6. 1(c)(ii)2 marksExplain why the digestion of starch stops when food reaches the stomach.
7. 1(c)(iii)1 markName an enzyme which works best in the stomach.
8. 1(d)(i)3 marksAmylase is also found in plants. Suggest THREE plant structures in which amylase may be found.
9. 1(d)(ii)2 marksHow is the starch produced in leaves converted to a substance which can be transported to other parts of the plant?
10. 1(d)(iii)1 markGive ONE benefit of the storage of starch in plants.
11. 2(a)(i)6 marksState the name of the structures labelled A, B and C in Figure 2, and give ONE function of EACH structure.
12. 2(a)(ii)1 markUse a line and the letter D to show the cartilage in the joint in Figure 2.
13. 2(b)2 marksArthritis, a degenerative disease, may cause the wearing away of the cartilage of joints. Explain how this will affect joints.
14. 2(c)4 marksExplain how the muscles of the upper arm bring about the raising and lowering of the lower arm.
15. 2(d)2 marksSuggest why the treatment of some blood diseases may involve a bone marrow transplant.
16. 3(a)4 marksIdentify the parts labelled A and B and state the function of EACH part.
17. 3(b)6 marksThe cell in Figure 3 was left in a concentrated salt solution for one hour. In the space below, draw an annotated diagram to show the appearance of this plant cell after one hour.
18. 3(c)2 marksIf all the cells in a plant appear like the one drawn in (b) on page 7, the plant's ability to photosynthesize will be reduced. Explain why photosynthesis will be reduced.
19. 3(d)3 marksComplete the table below to show THREE differences between plant and animal cells.
20. 4(a)(i)6 marksDistinguish between the following pairs of terms: Allele and gene
21. 4(a)(ii)6 marksDistinguish between the following pairs of terms: Phenotype and genotype
22. 4(a)(iii)6 marksDistinguish between the following pairs of terms: Dominant and recessive
23. 4(b)5 marksBlack fur colour is controlled by a dominant allele, B, and brown fur colour by its recessive allele, b. This characteristic is NOT sex-linked. Give the genotypes of the parents and offspring of a cross between a black…
24. 4(c)4 marksHaemophilia is caused by an X-linked recessive gene. Two parents with the normal phenotype have a haemophiliac child. Use a genetic diagram to show how this is possible. (Xᴺ = normal; Xʰ = gene for haemophilia)
25. 5(a)4 marksDescribe the life cycle of a named insect vector.
26. 5(b)4 marksDistinguish between the transmission of a named pathogenic disease and a named physiological (lifestyle) disease.
27. 5(c)4 marksExplain how the treatment and control measures for a named pathogenic disease will differ from those of a named physiological disease.
28. 5(d)3 marksEvaluate the socio-economic impact of AIDS on the Caribbean population.
29. 6(a)6 marksWith the aid of a labelled diagram, describe the structure of the human male reproductive system. Indicate on the diagram the structure that produces gametes, and the structures that transport the gametes to allow…
30. 6(b)(i)4 marksName ONE method of contraception that works by preventing fertilization. Explain how EACH of the methods named above functions to prevent pregnancy.
31. 6(b)(ii)4 marksName ONE method of contraception that works by preventing ovulation. Explain how EACH of the methods named above functions to prevent pregnancy.
32. 6(c)5 marksCompare the means by which the gametes are brought together in flowering plants with the means by which the gametes are brought together in humans.