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2 marksNutrition in Living Organisms

CSEC Biology · January 2017 · Paper 2 · Question 1(c)(iv)

Leguminous plants like peanuts can make proteins with the help of nitrogen-fixing bacteria in their root nodules.

Suggest TWO reasons why plants need protein.

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Other parts of this question

  1. 1(a)(i)Plot the data in Table 1 on the grid below.[4 marks]
  2. 1(a)(ii)Use the graph plotted in (a)(i) to identify the optimum temperature for Enzyme X.[1 mark]
  3. 1(a)(iii)Account for the shape of the graph: Between 5 °C and 30 °C[2 marks]
  4. 1(a)(iii)Account for the shape of the graph: Above 40 °C[2 marks]
  5. 1(a)(iv)State ONE precaution that the students should take when carrying out this experiment.[1 mark]
  6. 1(b)(i)Name TWO enzymes that break down protein.[2 marks]
  7. 1(b)(ii)Name TWO parts of the human alimentary canal where enzymes that break down protein are found.[2 marks]
  8. 1(b)(iii)Suggest TWO reasons why the different enzymes for breaking down proteins are located in two different parts of the alimentary canal.[2 marks]
  9. 1(c)(i)Identify the type of relationship that exists between the peanut plant and the bacteria.[1 mark]
  10. 1(c)(ii)Explain your answer in (c)(i) on page 6.[3 marks]
  11. 1(c)(iii)Describe a suitable procedure for testing the presence of protein in peanuts.[3 marks]

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