An evidence-based masterclass guide for OCR A Level Biology B (Advancing Biology) H422, incorporating a comprehensive analysis of the exam papers, grade structures, common pitfalls, and tactical advice from chief examiners' reports to secure top marks.
読了時間 4 分更新日: 2026年6月21日
試験の概要
試験数
3
満点
270
制限時間
6時間
出題形式
4
試験
時間
配点
問題数
配点比率
出題形式
Fundamentals of biology
2時間 15分
110
44
41%
Multiple Choice, Short Answer / Structured, Level of Response (6-mark essays)
Scientific literacy in biology
2時間 15分
100
27
37%
Short Answer / Structured, Level of Response (6-mark essays)
Practical skills in biology
1時間 30分
60
18
22%
Data Analysis & Calculation, Level of Response (6-mark essays)
評価段階
A*ABCDEU
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, processes, techniques and procedures (32%)
AO2: Apply knowledge and understanding of scientific ideas, processes, techniques and procedures (36%)
AO3: Analyse, interpret and evaluate scientific information, ideas and evidence (32%)
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
Graph: zeros, intersections & turning points
Graphical calculator / GDC (exam mode)
目的: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.
使う場面: Checking solutions, sketching, or solving where an analytic method is hard.
手順
Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.
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.
Numerical equation solver
Graphical calculator / GDC (exam mode)
目的: Solve an equation or find a variable numerically when an algebraic route is long or implicit.
使う場面: Iterative or implicit equations, or to confirm an algebraic solution.
手順
Use the equation/zero solver, entering the equation and a sensible starting estimate.
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.
Numerical integration & differentiation
Graphical calculator / GDC (exam mode)
目的: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.
使う場面: Checking calculus answers, or where only a numerical value is needed.
手順
Use the GDC's numeric integral / derivative function with the limits or the point.
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 & probability distributions
Graphical calculator / GDC (exam mode)
目的: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.
使う場面: Statistics questions and hypothesis tests.
手順
Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).
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: 2Cells and microscopy
Failing to convert millimetre (mm) measurements to micrometres (µm) before calculating actual cell diameters in microscopy magnification questions.
回避方法: Always multiply the raw mm measurement from your ruler by 1000 to convert it to µm before substituting it into the formula: Actual Size = Image Size / Magnification.
2medium影響する配点: 2Proteins and enzymes
Describing low-temperature enzyme pathways vaguely by stating 'enzymes are denatured' at low temperatures, rather than describing the loss of kinetic energy.
回避方法: Clearly state that low temperatures decrease the kinetic energy of enzymes and substrates, reducing the frequency of successful collisions and enzyme-substrate complex (ESC) formation. Denaturation only occurs at high temperatures or extreme pH.
3high影響する配点: 1Population genetics and epigenetics
Losing calculation marks by failing to express final answers in standard form or to the requested number of significant figures (e.g., 4 s.f. in Hardy-Weinberg calculations).
回避方法: Check the exact formatting requirements at the end of calculation questions. If standard form is requested, convert your final number immediately (e.g., 1537000 as 1.537 x 10^6). Read the prompt specifically for s.f. requirements.
4medium影響する配点: 2Cells and microscopy
Omitting the 'north-west' cell counting rule when describing how to use a haemocytometer to estimate cell populations.
回避方法: Always explicitly state that cells touching the top/north and left/west border lines are counted, while those touching the bottom/south and right/east border lines are ignored, to avoid double-counting.
5medium影響する配点: 2Gas exchange in mammals and plants
Believing that the Bohr shift shifts the oxygen dissociation curve to the left during high exercise, rather than to the right.
回避方法: Remember that high carbon dioxide concentrations (produced during exercise) shift the curve to the right, which decreases haemoglobin's affinity for oxygen, allowing more oxygen to be offloaded to respiring muscle tissues.
6low影響する配点: 2Transport systems in mammals
Writing general safety rules (e.g., wearing safety glasses) when asked for specific precautions during physical dissection of animal tissues.
回避方法: Give context-specific precautions, such as cutting away from your body, handling sharp instruments (scalpels) with forceps, washing hands immediately after tissue contact, and disinfecting the workspace.