Quelpr
4 marksRespiration

CSEC Biology · January 2014 · Paper 2 · Question 1(a)(i)

An apparatus (Figure 1) is used to test the hypothesis that green plants and small animals produce carbon dioxide during aerobic respiration. Air is drawn into Jar I and out of Jar IV by a filter pump.

Complete Figure 1 by identifying the materials that EACH jar should contain.

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Other parts of this question

  1. 1(a)(ii)What is the expected observation in Jar IV?[1 mark]
  2. 1(b)(i)Describe how the apparatus in Figure 1 is modified to test the hypothesis that plants produce carbon dioxide during aerobic respiration.[2 marks]
  3. 1(b)(ii)Explain the function of the black cloth in the experiment.[2 marks]
  4. 1(b)(iii)Suggest TWO precautions that should be taken when conducting this experiment.[2 marks]
  5. 1(c)(i)Write a chemical equation to summarize aerobic respiration.[2 marks]
  6. 1(c)(ii)Explain the importance of aerobic respiration to living organisms.[2 marks]
  7. 1(d)In certain microorganisms, respiration occurs anaerobically. State the end products of anaerobic respiration.[2 marks]
  8. 1(e)Complete Table 1 to distinguish between photosynthesis and aerobic respiration.[8 marks]

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