An expert examiner-backed guide for Pearson Edexcel International AS Level Biology (WBI11/WBI12/WBI13), combining past paper evidence, practical skill rubrics, and high-yield study strategies.
阅读时间 5 分钟更新于: 2026年6月21日
试卷概览
卷数
3
总分
210
考试时间
4小时 20分钟
题型
4
试卷
时间
分数
题数
比重
题型
WBI11/01
1小时 30分钟
80
9
40%
選擇題, Short Answer, Calculations & Math, Extended Open Response (including LOR)
WBI12/01
1小时 30分钟
80
8
40%
選擇題, Short Answer, Calculations & Math, Extended Open Response (including LOR)
WBI13/01
1小时 20分钟
50
3
20%
選擇題, Short Answer, Calculations & Math, Extended Open Response (including LOR)
评级
ABCDEU
计算器规定
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
AO1: Knowledge and Understanding of Biology (35%)
AO2: Application of Knowledge and Understanding (45%)
AO3: Experimental and Practical Skills (20%)
根据历届试题与评分标准整理（2023–2026）。
计算器程序
Graph: zeros, intersections & turning points
Graphical calculator / GDC (exam mode)
用途: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.
使用时机: Checking solutions, sketching, or solving where an analytic method is hard.
步骤
Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Numerical equation solver
Graphical calculator / GDC (exam mode)
用途: Solve an equation or find a variable numerically when an algebraic route is long or implicit.
使用时机: Iterative or implicit equations, or to confirm an algebraic solution.
步骤
Use the equation/zero solver, entering the equation and a sensible starting estimate.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Numerical integration & differentiation
Graphical calculator / GDC (exam mode)
用途: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.
使用时机: Checking calculus answers, or where only a numerical value is needed.
步骤
Use the GDC's numeric integral / derivative function with the limits or the point.
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
Statistics & probability distributions
Graphical calculator / GDC (exam mode)
用途: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.
使用时机: Statistics questions and hypothesis tests.
步骤
Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).
考试提示: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
常见错误
1high涉及分数: 3Molecules, Transport and Health
Failing to draw a precise tangent line at the exact time coordinate requested on curved rate graphs.
如何避免: Align your ruler flat to the outer edge of the curve at exactly the requested point (e.g. 30 minutes) to ensure the tangent line has the correct, balanced slope before calculating dy/dx.
2medium涉及分数: 4Membranes, Proteins, DNA and Gene Expression
Omitting parent genotypes, gamete circles, or clear offspring phenotype links in genetic diagrams.
如何避免: Explicitly write out and label: 1. Parent Phenotypes, 2. Parent Genotypes, 3. Gametes (circled), 4. Offspring Genotypes, and 5. Offspring Phenotypes matched directly to their genotypes.
3high涉及分数: 2Practical Skills in Biology I
Omitting the thorough washing of beetroot discs in pigment/membrane leakage practical designs.
如何避免: Always state that beetroot discs must be washed in distilled water until no more pigment leaks out before exposing them to the experimental temperatures/solvents.
4high涉及分数: 2Cell Structure, Reproduction and Development
Losing marks on magnification calculations by dividing millimeters directly by micrometers without converting.
如何避免: Multiply your millimeter measurement by 1000 to convert to micrometers before dividing by the actual size (A = I / M).
5high涉及分数: 2Practical Skills in Biology I
Concluding a significant difference exists when standard deviation error bars overlap on a graph.
如何避免: If standard deviation error bars overlap, always state that the difference between the means is not statistically significant.
6medium涉及分数: 3Coordination, Response and Gene Technology
Confusing DNA methylation (adding a methyl group to cytosine bases in DNA) with histone modification (acetyl/methyl groups on histone proteins).
如何避免: Specify that DNA methylation involves adding a methyl group directly to a cytosine base (CpG island) in the DNA template to block RNA polymerase binding.
7medium涉及分数: 3Molecules, Transport and Health
Omitting named heart chambers or valves when tracing the pathway of a broken-off blood clot causing a pulmonary embolism.
如何避免: Trace the blood clot's precise path: deep leg vein → vena cava → right atrium → tricuspid (atrioventricular) valve → right ventricle → pulmonary artery → lungs.
8high涉及分数: 1Common Units and Calculations
Using the wrong denominator in percentage change calculations (dividing by the final value instead of the initial value).
如何避免: Always calculate: ((Final - Initial) / Initial) * 100. Double check that the denominator is your starting/initial baseline value.