Master the OCR GCSE (9-1) Gateway Biology A (J247) exam with this evidence-based guide. Learn to manage your 105 minutes per paper, structure perfect Level of Response answers, master magnification calculations, and avoid high-frequency conceptual traps in enzyme kinetics, reflex arcs, and plant respiration.
読了時間 3 分更新日: 2026年6月21日
試験の概要
試験数
2
満点
180
制限時間
3時間 30分
出題形式
3
試験
時間
配点
問題数
配点比率
出題形式
J247/03: Paper 3 (Higher Tier)
1時間 45分
90
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J247/04: Paper 4 (Higher Tier)
1時間 45分
90
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評価段階
987654321
電卓の規定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: Demonstrate knowledge and understanding of scientific ideas and scientific techniques and procedures. (40%)
AO2: Apply knowledge and understanding of scientific ideas and scientific enquiry, techniques and procedures. (40%)
AO3: Analyse information and ideas to interpret and evaluate, make judgements and draw conclusions and develop and improve experimental procedures. (20%)
過去問と採点基準にもとづいて作成（2022–2024）。
電卓プログラム
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
目的: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使う場面: Solving or sketching a function when you want to find where its graph crosses or turns.
手順
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
目的: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使う場面: Any data-handling, statistics, or required-practical analysis question.
手順
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
目的: Keep full-precision intermediate values to avoid rounding errors.
使う場面: Multi-step calculations where premature rounding loses the final accuracy mark.
手順
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
目的: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使う場面: As a check only, after solving by hand.
手順
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
試験での注意: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
よくあるミス
1high影響する配点: 4Cell structures
Failing to convert units (e.g. millimetres to micrometres) before calculating magnification factor.
回避方法: Always convert measurements to the same unit first. Multiply millimetres by 1000 to get micrometres, then use the formula: Magnification = Image Size / Actual Size.
2medium影響する配点: 3Coordination and control – the nervous system
Including the conscious brain in mammalian reflex arc pathways.
回避方法: Route the reflex arc strictly from receptor to sensory neurone, to relay neurone in the spinal cord, to motor neurone, and finally to the effector. Avoid including conscious brain structures.
3high影響する配点: 6Global challenges
Failing to address all bullet points or prompts in a 6-mark Level of Response question.
回避方法: Before writing, tick off every prompt in the question. Dedicate at least one clear, well-structured paragraph to each bullet point to ensure you can reach Level 3.
4medium影響する配点: 2Respiration
Believing that plants do not respire during the day, or that they only respire at night.
回避方法: Clearly state in respiration/photosynthesis answers that plants respire continuously (24/7) to produce ATP for active transport and cell division, while photosynthesis only occurs in light.
5medium影響する配点: 2Cell structures
Using sketchy, shaded, or double lines when drawing biological diagrams (e.g., cell structures or mitochondria).
回避方法: Draw biological diagrams with clean, clear, single continuous lines using a sharp HB pencil. Do not shade or color any parts of the diagram.
6medium影響する配点: 1Monitoring and maintaining the environment
Stating that peer review is simply a spelling/grammar check.
回避方法: Define peer review as an evaluation of scientific validity, methodology, credibility, and ethical standards conducted by other independent scientific experts in the same field.
7high影響する配点: 2Monitoring and maintaining health
Stating that antibodies or lymphocytes directly engulf pathogens.
回避方法: Differentiate clearly: phagocytes engulf pathogens (phagocytosis), whereas lymphocytes produce antibodies that bind to antigens on pathogens, neutralizing them or marking them for destruction.
8high影響する配点: 2What happens in cells (and what do cells need)?
Using imprecise terms like 'amount' when describing experimental control variables.
回避方法: Always specify the precise physical property: use 'volume' for liquids, 'concentration' for chemical solutions, and 'mass' for solids.