CAPE Biology Unit 2 · January 2023 · Paper 2 · Question 1(a)
Write a balanced chemical equation to summarize the process of aerobic respiration.
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- 1(b)List TWO characteristics of gaseous exchange surfaces in mammals.[2 marks]
- 1(c)Suggest THREE ways in which respiration differs from breathing.[6 marks]
- 1(d)(i)Name the process being demonstrated in Figure 1.[1 mark]
- 1(d)(ii)Name the structures in humans that are represented by the following labels on the apparatus in Figure 1. Label: Glass tube (vertical), Balloons, Bell jar,…[4 marks]
- 1(d)(iii)Suggest TWO reasons why a glass bell jar was used instead of a plastic bag, in setting up the experiment.[2 marks]
- 1(d)(iv)State TWO consequences of a puncture in the human structure that is represented by the rubber sheet.[2 marks]
- 1(d)(v)During the experiment, a student pulls the rubber sheet downwards. State the expected observation.[1 mark]
- 1(d)(vi)Give TWO reasons for the expected observation stated in (v).[2 marks]
- 1(e)List THREE precautions that should be taken when setting up the apparatus in Figure 1 on page 5.[3 marks]
More practice: the rest of this paper · more Cellular Respiration and ATP Synthesis questions · all CAPE Biology Unit 2 past papers