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A-LevelBiologyEnergy and respirationOct/Nov 2019Paper 4 Q86 Marks

8 The passage below outlines the structure of the mitochondrion. Complete the passage by using the most appropriate scientific term(s). The mitochondrion is found in eukaryotic cells. It is bound by a double membrane. The outer membrane is permeable to pyruvate, which is the main product of **....................................................................................................................................** . The inner membrane is folded to form **...................................................................................** , which increase the surface area of the membrane. Embedded in the inner membrane are the carrier proteins of the electron transport chain and the protein complex responsible for ATP production, known as **............................................................................................................** . Electron flow leads to the build-up of a large concentration of **...................................................** in the intermembrane space due to the activity of the electron transport chain. The **................................................................................................................** of the mitochondrion, which contains enzymes, is the site of the link reaction and the **................................................................................................................** .

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Biology Question

Topic

This structured question tests Energy and respiration in A-Level Biology (syllabus code 9700). It is worth 6 marks.

Source

This question appeared in the Cambridge A-Level Biology Oct/Nov 2019 examination, Paper 4 Variant 3.

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