CAPE Biology Unit 2 · 2016 · Paper 2

20 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 the drawing in Figure 1 to accurately show palisade cells and a vascular bundle.
2. 1(a)(ii)4 marksUse annotated labels to identify and describe the cells labelled I and II in the spaces provided next to Figure 1.
3. 1(b)(i)4 marksName the processes labelled X and Y, and provide a brief description for each process.
4. 1(b)(ii)3 marksWith reference to Figure 2, comment on one major human activity that has impacted global nitrogen cycling.
5. 2(a)(i)4 marksOn the grid provided on page 9, plot a line graph of saturation of haemoglobin at various partial pressures of oxygen.
6. 2(a)(ii)2 marksWith reference to the shape of the plotted graph, describe the observed changes in oxygen uptake by haemoglobin as oxygen concentration increases.
7. 2(a)(iii)2 marksComment on the significance of this response for oxygen transport in the body.
8. 2(b)(i)3 marksIdentify the regions of the nephron labelled A, B, and C in Figure 3.
9. 2(b)(ii)4 marksOutline the process of urea formation and suggest a reason why mammals produce nitrogenous waste in the form of urea.
10. 3(a)(i)4 marksComplete Table 2 by filling in the missing details in the relevant spaces.
11. 3(a)(ii)3 marksExplain why a person is unlikely to be reinfected after an initial infection with measles.
12. 3(b)(i)4 marksCompare the overall average age of first use of alcohol by males with that of females across the region, quoting overall mean values in your comparison.
13. 3(b)(ii)4 marksGiving a brief explanation, suggest two major social consequences of adolescent alcohol abuse in the Caribbean.
14. 4(a)6 marksWith reference to key steps, explain how the net production of high energy compounds is achieved in glycolysis.
15. 4(b)(i)5 marksDiscuss two environmental benefits of maintaining biodiversity, including a definition of biodiversity in your discussion.
16. 4(b)(ii)4 marksGiving examples, distinguish between in situ and ex situ conservation methods.
17. 5(a)8 marksDefine the term 'hormone'. With reference to insulin and glucagon, explain how hormones function in the coordination of activities in mammals.
18. 5(b)7 marksExplain the term 'neuromuscular junction', and using knowledge of synaptic transmission, explain why Myasthenia Gravis (MS) causes progressive weakening of skeletal muscles. (Full details of synaptic transmission steps…
19. 6(a)8 marksExplain the mechanism by which the dengue fever virus multiplies within the body and its mode of transmission from person to person. Comment on how this knowledge allows better prevention of the disease.
20. 6(b)7 marksDiscuss the social and economic impacts of AIDS in the Caribbean region.