plumiStarch and cellulose: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 4.1.2 Starch and cellulose, 2019–2025, with mark schemes and examiner’s reports where available.
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Q1(c)(ii)
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All 19 questions on Starch and cellulose, as a list
- June 2024, AS Unit 2, Q1(c)(ii) (2 marks): Explain how the structure of starch enables the potato tubers to have a high energy content. (2)
- June 2024, AS Unit 2, Q8(b)(i) (3 marks): Comment on the results of this investigation. (3)
- June 2024, Unit 4, Q4(a)(i) (1 mark): Which row of the table describes the structure of cellulose? (1) Type of glucose molecule Type of glycosidic bond alpha (α) A 1–4 alpha (α) B 1–6 beta (β) C 1–4
- October 2023, AS Unit 2, Q3(b)(i) (1 mark): Plant cell walls contain cellulose. How many of the following statements about cellulose molecules are correct? contain α‑glucose molecules • • contain 1,4 and
- June 2023, AS Unit 2, Q1(b)(ii) (1 mark): How many of the following show the structure of part of a starch molecule? HO HO HO HO O O O O O OH OH OH OH O O O O O O HO HO HO HO CH2OH H OH CH2OH H OH O O H
- June 2023, AS Unit 2, Q1(b)(iii) (1 mark): Give one role of starch molecules in a leaf cell. (1)
- June 2023, Unit 4, Q4(a) (1 mark): Which type of glycosidic bonds are broken in the digestion of cellulose? (1) A α 1-4 B α 1-6 C β 1-4 D β 1-6
- June 2023, Unit 6, Q1(b)(ii) (3 marks): The scientific report suggested that caffeine affected the production of the cellulose molecules needed for cell division. Describe the structure of a cellulose
- January 2022, Unit 6, Q1(b) (3 marks): Cellulose is a major component of plant fibres. Describe the structure of a cellulose molecule. (3)
- October 2021, AS Unit 2, Q6(a)(ii) (3 marks): Explain how the structure of starch relates to its function. (3)
- October 2021, AS Unit 2, Q6(b)(i) (1 mark): Which is the percentage of the world cassava crop that is grown in Africa? (1) A 33 % B 34 % C 66 % D 67 %
- October 2021, AS Unit 2, Q6(b)(ii) (1 mark): It is predicted that the world maize production will increase by 2.3 % in the following year. Calculate the world production of maize in the following year. Giv
- June 2021, AS Unit 2, Q1(a)(i) (1 mark): Which molecule is shown in the diagram? CH2OH H OH O OH H OH H H OH (1) A α‑glucose B β‑glucose C starch D sucrose
- June 2021, AS Unit 2, Q1(a)(ii) (1 mark): Which is a feature of cellulose molecules? (1) A contain peptide bonds B contain α‑glucose molecules C form microfibrils D are soluble
- January 2021, AS Unit 2, Q1(a)(i) (1 mark): How many of the following statements about starch are correct? • contains α-glucose and β-glucose molecules • contains amylose and amylopectin • stored in the t
- January 2021, AS Unit 2, Q1(a)(ii) (1 mark): How many of the following statements about a cellulose molecule are correct? • contains α-glucose and β-glucose molecules • contains 1,4 glycosidic bonds • form
- October 2020, AS Unit 2, Q1(a)(ii) (1 mark): How many of the following statements about starch are correct? 1. it has a compact shape 2. it contains 1,6 glycosidic bonds only 3. it is a polymer of β-glucos
- October 2020, Unit 6, Q1(a) (2 marks): The tissues of the tubers contain starch molecules. Explain why starch is an energy storage molecule. (2)
- January 2020, AS Unit 2, Q6(c) (1 mark): The walls of xylem vessels contain cellulose. Which of the following shows the structure of part of a cellulose molecule? (1) HO HO HO HO O O O O O OH OH OH OH
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