IB DP · 試験対策

Biology 試験対策

An evidence-based masterclass on passing IB Diploma Programme Biology, containing a deep dive into the latest 2025 paper blueprints, common pitfalls to avoid, and exact techniques for securing maximum marks in Papers 1A, 1B, and 2.

読了時間 3 分更新日: 2026年6月21日

試験の概要

試験数
3
満点
155
制限時間
4時間 30分
出題形式
4
試験時間配点問題数配点比率出題形式
Paper 1A1時間 20分40
Paper 1B40分35
Paper 22時間 30分80
評価段階
7654321
電卓の規定

A graphic display calculator (GDC) from the IB-approved list is required for most Mathematics and Sciences papers and must be set to examination mode. Note that some papers do not permit a calculator (for example Mathematics Paper 1 and the multiple-choice Sciences Paper 1).

  • AO1: AO1: Demonstrate knowledge and understanding of scientific facts, concepts, and terminology.
  • AO2: AO2: Apply scientific facts, concepts, and terminology to explain phenomena and solve problems.
  • AO3: AO3: Formulate, analyze, and evaluate scientific hypotheses, research questions, methodologies, and data.

過去問と採点基準にもとづいて作成(2023–2025)。

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: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

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: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

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: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

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: Use a GDC from the IB-approved list in examination mode. Some papers do not permit a calculator. Always show your reasoning.

よくあるミス

  1. 1high影響する配点: 1Cell respiration

    Writing that glucose 'produces' energy during cell respiration.

    回避方法: Describe respiration as the chemical oxidation of glucose to yield ATP (or chemical energy stored in ATP).
  2. 2high影響する配点: 2Ecology

    Writing separate, sequential paragraphs of descriptions when a question asks to 'compare and contrast' datasets or biological features.

    回避方法: Use explicit comparative terms side-by-side (such as 'whereas', 'both', 'higher than', 'lower than') to construct direct comparisons.
  3. 3high影響する配点: 1Cell structure

    Losing calculation marks for cell size or magnification due to incorrect unit conversions (such as dividing millimeters on paper directly by micrometers).

    回避方法: Always convert all measurements to the same unit (ideally micrometers, \(\mu\text{m}\), where 1 mm = 1000 \(\mu\text{m}\)) before dividing.
  4. 4medium影響する配点: 2Defence against disease

    Believing that antibiotics can kill or target viruses.

    回避方法: Explain that viruses lack their own metabolic pathways, cell walls, or 70S ribosomes, which are the targets of antibiotic action.
  5. 5high影響する配点: 1Cell respiration

    Using the vague term 'amount' or 'quantity' when identifying independent or dependent variables in experimental descriptions.

    回避方法: Use exact scientific terms such as 'mass', 'volume', or 'concentration', and always state the associated units.
  6. 6medium影響する配点: 2Water

    Drawing a water molecule diagram without the V-shape or omitting partial dipoles.

    回避方法: Draw the water molecule with a clear V-shape angle, label \(\delta^-\). on the oxygen atom, \(\delta^+\) on both hydrogen atoms, and draw dashed lines between oxygen and hydrogen of adjacent molecules for hydrogen bonds.

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