CSEC Human and Social Biology · May/June 2016 · Paper 2

36 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)1 markName a test used to detect the presence of starch in food.
2. 1(a)(ii)2 marksState TWO foods other than potato and cassava that are rich in starch.
3. 1(a)(iii)1 markState which of the listed foods Matthew should eat for muscle growth and repair: fish, plantain, carrots, lentil peas.
4. 1(a)(iv)2 marksName TWO reagents used to test for the presence of protein in food.
5. 1(b)(i)3 marksDraw a bar graph on the grid provided on page 7 to represent the data in Table 1.
6. 1(b)(ii)1 markIdentify which country has the higher incidence of both marasmus and kwashiorkor.
7. 1(b)(iii)1 markIdentify which country has the lower total incidence of diseases altogether.
8. 1(b)(iv)2 marksSuggest the major nutrient lacking in children of Country X causing night blindness, and state ONE source of this nutrient.
9. 1(c)2 marksSuggest TWO diseases that could develop from overeating and lack of exercise.
10. 2(a)4 marksState the meaning of the terms diffusion and osmosis.
11. 2(b)(i)2 marksSuggest TWO differences between the movement of molecules illustrated in Figure 1 and Figure 2.
12. 2(b)(ii)1 markIdentify whether osmosis is taking place in Figure 1 or Figure 2.
13. 2(b)(iii)2 marksState what would happen to the water level in the beaker in Figure 2 after one hour, and explain why.
14. 2(c)(i)2 marksState TWO organs in the human body, other than the small intestine, in which diffusion occurs.
15. 2(c)(ii)4 marksDescribe and explain the structure and function of the villus in the small intestine.
16. 3(a)(i)3 marksName the end products of aerobic respiration.
17. 3(a)(ii)3 marksName the end products of anaerobic respiration in humans.
18. 3(b)(i)1 markIdentify which drawing in Figure 3 (A or B) shows the rib cage during inspiration.
19. 3(b)(ii)4 marksWith reference to Figure 3, outline the activities that occur during inspiration.
20. 3(c)(i)1 markSuggest the disease from which Desirée is most likely suffering.
21. 3(c)(ii)2 marksSuggest TWO triggers for Desirée's condition other than smoke.
22. 3(c)(iii)1 markName the treatment Desirée is most likely to receive at the hospital.
23. 4(a)(i)1 markIdentify the type of cell division illustrated in Figure 4.
24. 4(a)(ii)1 markState whether sex cells or somatic cells are produced by this process.
25. 4(a)(iii)2 marksState the chromosome number of the parent cell and of each daughter cell in humans.
26. 4(a)(iv)2 marksState the TWO types of sex chromosomes that fathers can pass to their offspring.
27. 4(b)(i)3 marksExplain the advantage of testes being located outside the abdominal cavity.
28. 4(b)(ii)3 marksOutline the roles played by the epididymis, seminal vesicles, and prostate gland in forming semen.
29. 4(c)(i)2 marksState TWO measures a woman can take to protect herself against cervical cancer.
30. 4(c)(ii)1 markName ONE sexually transmitted infection other than the one associated with cervical cancer.
31. 5(a)(i)3 marksIdentify the single-celled organism that causes malaria, and state TWO tissues or organs it destroys in the human body.
32. 5(a)(ii)3 marksList THREE symptoms of malaria.
33. 5(b)9 marksDiscuss the disease Ravi most likely contracted, stating its name, causative organism, TWO possible transmission routes from his meal, and TWO preventative measures for the future.
34. 6(a)6 marksDescribe THREE processes by which water cycles between the Earth and the atmosphere.
35. 6(b)5 marksExplain why the fish in the pond are dying, detailing the stages leading to their mortality.
36. 6(c)4 marksExplain the impact of these dumped chemicals on the aquatic food chain.