plumiInorganic ions: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 2.1.2.6 Inorganic ions, 2016–2025, with mark schemes and examiner’s reports where available.
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Open the full PDFYour answerQ3(a)(ii)
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Open the full PDFYour answerQ3(b)
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Open the full PDFQ4(a)(i)
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All 5 questions on Inorganic ions, as a list
- June 2025, Paper 1, Q1 (1 mark): Which option describes a function of inorganic ions? Ca2+ is pumped across the membrane of a neurone to establish the resting potential. A Cl– and HCO3 – are in
- June 2023, AS Paper 2, Q3(a)(ii) (2 marks): Sodium hydroxide is a white solid ionic compound which is highly soluble in water. It consists of anions and cations. Complete the table below. State the chemic
- June 2022, AS Paper 1, Q4 (1 mark): The table shows the chemical symbols for some inorganic ions involved in biological processes. Ammonium ion Calcium ion Nitrate ion + Ca+ – A NH4 NO2 – Ca2+ – B
- November 2020, Paper 3, Q3(b) (2 marks): The solution in which the seedlings were grown contained various dissolved ions. The table below lists two of the functions of these ions in the seedlings. Comp
- June 2018, AS Paper 2, Q4(a)(i) (2 marks): Ions have a number of important roles in living organisms. Complete the table below by identifying the ion that plays each of the roles. Choose from the followi
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