Movement into and out of: past paper questions
Real questions on movement into and out of
The newest 20 of 199 written questions. Open one to see it on the real paper.
- 9700/22 · October/November 2025 · Q4b(i)[1]
With reference to Fig. 4.2, suggest why fewer O‑IMVs are formed than OMVs.
See it on the paper → - 9700/22 · October/November 2025 · Q4b(ii)[1]
Suggest why ATP is found within O‑IMVs but not in OMVs.
See it on the paper → - 9700/22 · October/November 2025 · Q4b(iii)[2]
Suggest and explain why the discovery that O‑IMVs contain DNA has implications for antibiotic resistance.
See it on the paper → - 9700/22 · October/November 2025 · Q6b(i)[2]
Describe the quaternary structure of a haemoglobin molecule.
See it on the paper → - 9700/22 · October/November 2025 · Q6b(ii)[2]
Outline how a haemoglobin molecule can become fully saturated with oxygen to form oxyhaemoglobin. The boundaries and names shown, the designations used and the presentation of material on any maps contained in this question paper/insert do not imply official endorsement or acceptance by Cambridge Assessment Internation...
See it on the paper → - 9700/41 · October/November 2025 · Q9b[4]
A biosensor can be used to measure the concentration of glucose in urine. Outline how a biosensor measures the concentration of glucose in urine.
See it on the paper → - 9700/42 · October/November 2025 · Q3a(iii)[3]
The glucose 6‑phosphate in the cytoplasm of the bacterial cell is used to produce fructose 1,6‑bisphosphate. Fructose 1,6‑bisphosphate is used in glycolysis. Outline the events that fructose 1,6‑bisphosphate. occur in glycolysis following the production of
See it on the paper → - 9700/42 · October/November 2025 · Q10b[4]
When a nerve impulse reaches the neuromuscular junction, acetylcholine is released and diffuses to the sarcolemma. Describe how the release of acetylcholine can result in the binding of calcium ions to troponin in the sarcomere.
See it on the paper → - 9700/42 · October/November 2025 · Q10c[3]
Muscle contraction can be affected by a low blood glucose concentration. Suggest how a low blood glucose concentration would affect the functioning of the sarcomere.
See it on the paper → - 9700/21 · May/June 2025 · Q6a(i)[1]
State the part of the haemoglobin molecule labelled X.
See it on the paper → - 9700/21 · May/June 2025 · Q6a(ii)[1]
State the function of the structure labelled X.
See it on the paper → - 9700/22 · May/June 2025 · Q2a[2]
Describe features of a haemoglobin molecule that are typical of a globular protein, other than having an approximately spherical shape.
See it on the paper → - 9700/22 · May/June 2025 · Q3d[3]
Each carrot plant produces a carrot in the first year of growth. If the carrot is not removed from the plant after it matures, the plant passes through a dormant period and shoots develop from the carrot in the second year of growth. This allows flowers to be produced and seed formation to occur before the plant dies....
See it on the paper → - 9700/23 · May/June 2025 · Q4a(i)[1]
State how a lower concentration of cholesterol would make the properties of lysosome membranes different from other membranes in mammalian cells.
See it on the paper → - 9700/23 · May/June 2025 · Q4a(ii)[1]
Suggest why the lower concentration of cholesterol in lysosome membranes would help lysosomes carry out their function.
See it on the paper → - 9700/42 · May/June 2025 · Q1a(i)[1]
The coenzymes NAD and FAD deliver hydrogen atoms to the electron transport chain (ETC). With reference to Fig. 1.1, state which of the four carriers receives hydrogen atoms from reduced FAD.
See it on the paper → - 9700/42 · May/June 2025 · Q1a(ii)[2]
Hydrogen atoms that are delivered to the ETC by reduced NAD and reduced FAD split into protons and electrons. Energy is released as electrons pass along the ETC. Describe the events that occur as a result of this release of energy.
See it on the paper → - 9700/42 · May/June 2025 · Q1a(iii)[3]
Describe how structure 5 in Fig. 1.1 is involved in oxidative phosphorylation.
See it on the paper → - 9700/42 · May/June 2025 · Q10a[4]
The grey seal, Halichoerus grypus, is an aquatic mammal that lives in the North Atlantic Ocean. It feeds on fish, which it hunts at depths of up to 70 metres. Fig. 10.1 Diving to hunt for fish has an effect on the respiration of the grey seal. A study was carried out to measure the blood lactate concentration of a grey...
See it on the paper → - 9700/43 · May/June 2025 · Q6a(i)[1]
Name the main metabolic waste product excreted by the kidneys.
See it on the paper →
What examiners said
Candidates were expected to recognise the direction of the concentration gradient in determining the type of mechanism involved in the transport of Na+ and K+ ions. Not all candidates appreciated that ions cannot cross the hydrophobic core of the phospholipid bilayer, and that simple diffusion could not therefore be one of the mechanisms. Some confused responses referred to sodium–potassium pumps...
— Examiner report, February/March 2025, 9700/22 Q1(d) (Cambridge)
Not all candidates referred to osmosis in their explanations. Some candidates mistakenly considered that cortex cell A had a lower water potential than cortex cell B and therefore explained the movement of water in the incorrect direction. Candidates often find it easier to refer to differences in water potential in terms of ‘more negative’ and ‘less negative’ rather than simply ‘lower’ (more neg...
— Examiner report, February/March 2025, 9700/22 Q1(e) (Cambridge)
A majority of candidates knew that carbon dioxide dissolves in water to form carbonic acid. Many showed an understanding that the acid will dissociate and release H + ions, which would lead to a decrease in pH of the soil. Fewer went on to consider that the low pH could cause Fe2+ ions to detach from the clay particles. Some candidates thought that the reaction between carbon dioxide and water in...
— Examiner report, February/March 2025, 9700/22 Q1(f)(i) (Cambridge)
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