CAPE Biology Unit 2 · May/June 2021 · Paper 2

21 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)5 marksIn the space below, construct a table to represent the data given in Figure 1.
2. 1(a)(ii)5 marksIdentify the processes labelled A-E in Figure 2.
3. 1(a)(iii)3 marksAnimals may also be involved in the nitrogen cycle. Extend the diagram in Figure 2 to illustrate the involvement of animals in the nitrogen cycle.
4. 1(b)(i)2 marksState TWO similarities between fermentation (anaerobic respiration) reactions in animals and yeast.
5. 1(b)(ii)3 marksExplain the function of the fermentation reactions in organisms.
6. 1(c)(i)12 marksDiscuss the importance of the following components of oxidative phosphorylation: The formation of a proton gradient.
7. 1(c)(ii)12 marksDiscuss the importance of the following components of oxidative phosphorylation: The synthesis of ATP.
8. 1(c)(iii)12 marksDiscuss the importance of the following components of oxidative phosphorylation: The role of oxygen.
9. 2(a)(i)5 marksIn the space below, construct an annotated diagram of the motor neuron provided in Figure 3. Show the magnification of your drawing.
10. 2(a)(ii)2 marksState the TWO main functions of synapses.
11. 2(a)(iii)6 marksOutline the sequence of events that occurs when an action potential reaches a synapse.
12. 2(b)(i)2 marksDifferentiate between the 'source' and 'sink' in relation to phloem transport.
13. 2(b)(ii)3 marksExplain how the sieve elements of the phloem are loaded with solutes against a concentration gradient.
14. 2(c)12 marksDiscuss the mass flow theory as a mechanism of sugar transport in the phloem. Your response must include the processes labelled 1-7 and the movement of substances as indicated by the arrows.
15. 3(a)(i)2 marksDefine the term 'monoclonal antibody'.
16. 3(a)(ii)3 marksIdentify the areas labelled I-III in Figure 5, on page 16, where Reactions A, B and C in Figure 6 occur.
17. 3(a)(iii)5 marksOutline the processes which would occur in EACH labelled area in Figure 5, on page 16, if the pregnancy test is positive.
18. 3(b)(i)5 marksOn the grid provided on page 19, construct a bar graph based on the data provided in Table 1.
19. 3(b)(ii)2 marksState TWO conclusions which can be drawn from the data in Table 1.
20. 3(b)(iii)1 markSuggest ONE measure that would be effective in reducing the prevalence of cigarette smoking.
21. 3(c)12 marksDiscuss THREE ways in which the nicotine in cigarette smoke can lead to the development of cardiovascular diseases.