CSEC Biology · May/June 2012 · Paper 2 · Question 1(b)
Design an experiment to determine the rate at which starch is broken down under different pH conditions.
The mark scheme is shown once you've answered.
Practise this questionOther parts of this question
- 1(a)(i)Construct a table to represent the data shown on the graph in Figure 1, using FOUR temperature values from the graph.[4 marks]
- 1(a)(ii)Describe the trend in enzyme activity as shown by the graph in Figure 1.[3 marks]
- 1(a)(iii)Explain what happens to the enzyme at temperatures above 37 °C.[2 marks]
- 1(c)(i)Name TWO parts of the human digestive system where amylase may be found.[2 marks]
- 1(c)(ii)Explain why the digestion of starch stops when food reaches the stomach.[2 marks]
- 1(c)(iii)Name an enzyme which works best in the stomach.[1 mark]
- 1(d)(i)Amylase is also found in plants. Suggest THREE plant structures in which amylase may be found.[3 marks]
- 1(d)(ii)How is the starch produced in leaves converted to a substance which can be transported to other parts of the plant?[2 marks]
- 1(d)(iii)Give ONE benefit of the storage of starch in plants.[1 mark]
More practice: the rest of this paper · more Nutrition in Living Organisms questions · all CSEC Biology past papers