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5 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · January 2022 · Paper 2 · Question 1(a)

Sarah investigated the variation in hair length for 16 girls in her class. The data obtained from the investigation are shown in Table 1.

On the grid provided on page 5, use appropriate scales and axes to draw a graph of the results obtained in Table 1. Provide an appropriate title for your graph and place hair length on the x-axis.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

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Other parts of this question

  1. 1(b)State TWO precautions which should have been taken during this investigation.[2 marks]
  2. 1(c)(i)Define the following terms: Continuous variation; Discontinuous variation.[2 marks]
  3. 1(c)(ii)Suggest the type of variation which was investigated in this experiment.[1 mark]
  4. 1(c)(iii)Identify the type of graph that would be suitable for representing the data from the second experiment.[1 mark]
  5. 1(d)(i)Suggest ONE way in which this genetic variation may have arisen in the moth population.[1 mark]
  6. 1(d)(ii)Suggest ONE reason why genetic variation would be important to the moths.[1 mark]
  7. 1(d)(iii)With the use of a genetic diagram, explain the results of a cross between a moth with brown wings and a moth with white wings that produces all offspring with…[6 marks]
  8. 1(d)(iv)Suggest the genotype of the parent with brown wings.[1 mark]
  9. 1(e)Suggest how the creation of the new type of diamond back moth differs from the formation of moths with a different wing colour.[2 marks]
  10. 1(f)(i)Name an appropriate device which can be used to capture the moth.[1 mark]
  11. 1(f)(ii)State how the moth is captured using the device named in (f) (i).[1 mark]
  12. 1(f)(iii)State ONE precaution that should be taken for the follow-up experiment in (f) (i).[1 mark]

More practice: the rest of this paper · more Cellular Respiration and ATP Synthesis questions · all CAPE Biology Unit 2 past papers