0654.B7.3.03 — Describe chemical digestion as the breakdown of large insoluble molecules into small soluble molecules: past paper questions
Real questions on 0654.b7.3.03 — describe chemical digestion as the breakdown of large insoluble molecules into small soluble molecules
The newest 6 of 6 written questions. Open one to see it on the real paper.
- 0973/31 · May/June 2025 · Q2b[4]
Complete the sentences about digestion. The breakdown of food into smaller pieces is called digestion. This increases the surface area of the food. molecules. This is called digestion and produces molecules that can be The food is then broken down from large molecules to small
See it on the paper → - 0973/31 · May/June 2023 · Q1a(iii)[2]
Complete the sentence to define the term digestion. Digestion is the of large, insoluble food molecules into small, water-soluble molecules using mechanical and
See it on the paper → - 0973/42 · May/June 2023 · Q12c(iii)[3]
A sample of nitrogen gas is held in a container with a fixed volume. The temperature of the nitrogen is increased. Explain the effect that increasing the temperature of the gas has on the pressure in the gas. Use ideas about molecules in your answer.
See it on the paper → - 0973/32 · May/June 2021 · Q10b[2]
Describe the role of chemical digestion in the alimentary canal.
See it on the paper → - 0973/41 · May/June 2021 · Q4e[1]
Describe how chemical digestion differs from mechanical digestion.
See it on the paper → - 0973/31 · October/November 2020 · Q1b[2]
A student has written an incorrect definition for digestion in a human. The definition the student has written is shown in Fig. 1.2. Digestion is the breakdown of large, insoluble food molecules into small, oil‑soluble molecules using mechanical and industrial processes. Fig. 1.2 Circle the two incorrect terms in the d...
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What examiners said
The marks most regularly awarded were for mechanical and chemical digestion. Candidates were less likely to state that the molecules changed from being insoluble to soluble.
— Examiner report, May/June 2025, 0973/31 Q2(b) (Cambridge)
There were many detailed and precise answers seen. Many candidates were able to explain why an increase in pressure occurred when temperature increased. Occasionally candidates referred to particle collisions but did not make it clear that an increased collision frequency with the wall of the container was responsible for the increase in pressure.
— Examiner report, May/June 2023, 0973/42 Q12(c)(iii) (Cambridge)
Some candidates described chemical digestion as requiring the use of an enzyme. In questions of this type, candidates should be careful to describe the differences as required by the question.
— Examiner report, May/June 2021, 0973/41 Q4(e) (Cambridge)
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