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.
อ่าน 5 นาทีอัปเดตเมื่อ: 21 มิ.ย. 2569
ภาพรวมข้อสอบ
จำนวนฉบับ
3
คะแนนเต็ม
210
เวลาสอบ
4ชม. 20นาที
ประเภทคำถาม
4
ฉบับ
เวลา
คะแนน
จำนวนข้อ
น้ำหนักคะแนน
ประเภทคำถาม
WBI11/01
1ชม. 30นาที
80
9
40%
Multiple Choice, Short Answer, Calculations & Math, Extended Open Response (including LOR)
WBI12/01
1ชม. 30นาที
80
8
40%
Multiple Choice, Short Answer, Calculations & Math, Extended Open Response (including LOR)
WBI13/01
1ชม. 20นาที
50
3
20%
Multiple Choice, Short Answer, Calculations & Math, Extended Open Response (including LOR)
เกณฑ์เกรด
ABCDEU
ข้อกำหนดเครื่องคิดเลข
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%)
วัตถุประสงค์: Plot a function to read its roots (zeros), points of intersection, and maxima/minima.
ใช้เมื่อใด: Checking solutions, sketching, or solving where an analytic method is hard.
ขั้นตอน
Graph the function(s) and use the built-in zero, intersect and maximum/minimum tools.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: Solve an equation or find a variable numerically when an algebraic route is long or implicit.
ใช้เมื่อใด: Iterative or implicit equations, or to confirm an algebraic solution.
ขั้นตอน
Use the equation/zero solver, entering the equation and a sensible starting estimate.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: Evaluate a definite integral \(\int_a^b f(x)\,dx\) or a gradient \(f'(x)\) at a point.
ใช้เมื่อใด: Checking calculus answers, or where only a numerical value is needed.
ขั้นตอน
Use the GDC's numeric integral / derivative function with the limits or the point.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: 1-var/2-var statistics, linear regression, and cumulative binomial / normal / Poisson probabilities without tables.
ใช้เมื่อใด: Statistics questions and hypothesis tests.
ขั้นตอน
Enter data in the statistics editor, or use the distribution menu (binomial cdf, normal cdf, …).
ข้อควรระวังในการสอบ: Allowed, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
ข้อผิดพลาดที่พบบ่อย
1highคะแนนที่เกี่ยวข้อง: 3Molecules, Transport and Health
Failing to draw a precise tangent line at the exact time coordinate requested on curved rate graphs.
วิธีหลีกเลี่ยง: 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.
2mediumคะแนนที่เกี่ยวข้อง: 4Membranes, Proteins, DNA and Gene Expression
Omitting parent genotypes, gamete circles, or clear offspring phenotype links in genetic diagrams.
วิธีหลีกเลี่ยง: 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.
3highคะแนนที่เกี่ยวข้อง: 2Practical Skills in Biology I
Omitting the thorough washing of beetroot discs in pigment/membrane leakage practical designs.
วิธีหลีกเลี่ยง: 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.
4highคะแนนที่เกี่ยวข้อง: 2Cell Structure, Reproduction and Development
Losing marks on magnification calculations by dividing millimeters directly by micrometers without converting.
วิธีหลีกเลี่ยง: Multiply your millimeter measurement by 1000 to convert to micrometers before dividing by the actual size (A = I / M).
5highคะแนนที่เกี่ยวข้อง: 2Practical Skills in Biology I
Concluding a significant difference exists when standard deviation error bars overlap on a graph.
วิธีหลีกเลี่ยง: If standard deviation error bars overlap, always state that the difference between the means is not statistically significant.
6mediumคะแนนที่เกี่ยวข้อง: 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).
วิธีหลีกเลี่ยง: 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.
7mediumคะแนนที่เกี่ยวข้อง: 3Molecules, Transport and Health
Omitting named heart chambers or valves when tracing the pathway of a broken-off blood clot causing a pulmonary embolism.
วิธีหลีกเลี่ยง: Trace the blood clot's precise path: deep leg vein → vena cava → right atrium → tricuspid (atrioventricular) valve → right ventricle → pulmonary artery → lungs.
8highคะแนนที่เกี่ยวข้อง: 1Common Units and Calculations
Using the wrong denominator in percentage change calculations (dividing by the final value instead of the initial value).
วิธีหลีกเลี่ยง: Always calculate: ((Final - Initial) / Initial) * 100. Double check that the denominator is your starting/initial baseline value.