CSEC Human and Social Biology · May/June 2013 · 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 marksState what the acronyms 'HIV' and 'AIDS' mean.
2. 1(a)(ii)2 marksState TWO ways in which HIV can be spread within a population, other than by having unprotected sex.
3. 1(a)(iii)2 marksState TWO symptoms of AIDS, other than weight loss.
4. 1(b)(i)3 marksOn the grid provided, construct a bar graph of the data in Table 1.
5. 1(b)(ii)3 marksCompare the number of deaths in the various age groups.
6. 1(b)(iii)3 marksSuggest THREE socio-economic effects that deaths within the 25–44 age group would have on a country.
7. 2(a)2 marksState TWO ways in which the structure of a plant cell differs from that of an animal cell.
8. 2(b)(i)1 markIdentify the type of cell shown in Figure 1.
9. 2(b)(ii)4 marksExplain how the structure of the cell shown in Figure 1 makes it suitable for its function.
10. 2(c)(i)3 marksList THREE characteristics of living organisms, other than respiration and feeding.
11. 2(c)(ii)5 marksExplain why respiration and feeding are characteristics that CANNOT be applied to a car, despite taking in oxygen, emitting carbon dioxide, and moving.
12. 3(a)(i)4 marksGive the names of TWO enzymes associated with digestion in humans, and state ONE function of EACH enzyme named.
13. 3(a)(ii)1 markName the type of digestion for which the teeth in the mouth are responsible.
14. 3(a)(iii)1 markState which type of tooth is MAINLY responsible for the type of digestion named in (a)(ii).
15. 3(b)(i)2 marksAt approximately which temperature and pH does amylase function the BEST?
16. 3(b)(ii)1 markSuggest what effect temperatures GREATER than 55 °C would have on enzymes.
17. 3(c)(i)4 marksExplain the role of the pancreas in the development of diabetes mellitus resulting from consumption of excessive carbohydrates and fats.
18. 3(c)(ii)2 marksSuggest TWO methods, other than the use of medication, which could be used to manage diabetes mellitus.
19. 4(a)(i)1 markState which type of cell division results in identical offspring.
20. 4(a)(ii)1 markState the number of chromosomes that will be found in the daughter cells of mitosis.
21. 4(a)(iii)1 markIn which type of cell does mitosis take place?
22. 4(b)(i)1 markState the name of the event during meiosis in which there is the exchange of small parts of DNA between homologous chromosomes.
23. 4(b)(ii)2 marksState the source of the homologous chromosomes and the importance of the event named in (b)(i).
24. 4(c)(i)4 marksDescribe the changes occurring in the menstrual cycle from Day 0 – Day 5 and Day 6 – Day 14.
25. 4(c)(ii)3 marksDescribe the changes that take place with progesterone levels AFTER ovulation, if pregnancy occurs, and if pregnancy does NOT occur.
26. 4(d)2 marksOutline how follicle-stimulating hormone (FSH) controls the production of oestrogen.
27. 5(a)2 marksName the vector for leptospirosis and the vector for gastroenteritis.
28. 5(b)13 marksWrite educational information for your community about BOTH leptospirosis and gastroenteritis, covering: Name of disease, Signs and symptoms, Ways to prevent pathogens from entering the body, and Prevention and control…
29. 6(a)(i)2 marksDefine the term 'pollutant', and give an example of a pollutant that CANNOT be seen or touched.
30. 6(a)(ii)1 markOutline ONE way in which water can be purified on a small scale.
31. 6(a)(iii)5 marksExplain how water can become polluted after a hurricane.
32. 6(b)7 marksDescribe a test for determining if your school's water supply is contaminated with bacteria, and explain how the results of the test are to be interpreted.