The answer depends on when you take the IB Biology examination. Students sitting examinations in 2026 or 2027 follow the course first assessed in 2025 and do not receive a separate Biology data or formula booklet, although a permitted calculator is required under the published examination instructions. A dedicated IB Biology data booklet is being introduced for first assessment in 2028, when students will receive a clean copy in the written examinations.
This distinction matters because online advice often mixes different syllabus versions. This guide explains which resources apply to each cohort, what must still be memorized, how to use calculators efficiently, and how worked solutions can teach you to make decisions under examination pressure.
Which IB Biology exam resources do you receive?
The current IB Biology course has two written papers at both Standard Level and Higher Level. Paper 1 consists of Paper 1A, containing multiple-choice questions, and Paper 1B, containing data-based questions. Paper 2 includes data-based, short-answer, and extended-response questions.
According to the official Biology subject brief for first assessment 2025, Paper 1 contributes 36% and Paper 2 contributes 44% of the final grade. The scientific investigation contributes the remaining 20%.
Examination cohort
Biology data or formula booklet
Calculator
Main implication
2026 and 2027 examinations
No separate official Biology booklet
Required under current specimen-paper instructions, subject to the annual IB calculator policy
Learn required equations, biological structures, units, and calculation methods
First assessment 2028 onward
Clean official Biology data booklet provided
Follow the instructions printed on the paper and the current calculator policy
Learn where information is located and how to apply it rather than merely memorizing it
The official state that a calculator is required. This is more relevant to the current course than older calculator documents referring to the previous Biology syllabus, under which calculators were prohibited on Paper 1.
Always read the instructions on your actual examination paper and check the current IB examination calculator policy. Your school’s IB coordinator is responsible for confirming which calculator models and examination resources are permitted for your session.
The Biology data booklet for first assessment 2028
For students beginning the maintained course leading to first assessment in 2028, the IB has introduced a dedicated Biology data booklet. The booklet accompanies the Biology guide and contains reference material such as physiology diagrams, equations, constants, and other course-relevant data. Schools obtain the controlled official version through the IB Programme Resource Centre.
Students following this version should have access to the booklet during the course, not only on examination day. In the examination, each candidate receives a clean copy, which means you cannot bring a personally highlighted, tabbed, or annotated version.
The purpose is not to remove the need for biological knowledge. It shifts some assessment away from memorizing reference material and toward:
selecting the relevant relationship or diagram;
interpreting symbols and biological features;
substituting values with consistent units;
connecting reference information to an unfamiliar context;
explaining the biological meaning of a result.
A printed equation does not tell you when to use it. Likewise, a supplied physiological diagram does not replace understanding of the structures, processes, and causal relationships represented.
What current students must know without a formula booklet
Students taking examinations before 2028 should not assume that a formula seen on an unofficial revision sheet will be supplied. Unless information is printed in the question, you should be prepared to recall and apply common quantitative relationships taught in the course.
These commonly include:
magnification = image size ÷ actual size;
percentage change relative to an initial value;
calculations involving means, rates, ratios, and proportions;
interpretation of logarithmic axes and scientific notation;
statistical procedures specified in your course;
conversions between units, such as millimetres and micrometres.
You must also recognize common biological diagrams and conventions. A calculator can process numbers, but it cannot decide that two measurements use incompatible units or that a percentage change should be calculated relative to the initial value.
Create a one-page revision formula list for practice, but do not expect to take it into the examination. The RevisionDojo IB Biology resources can help you identify which calculations and applications occur within each syllabus area.
How to use a data booklet efficiently
Students using the 2028 booklet should aim for navigation fluency, not complete memorization. You should know the booklet’s broad organization well enough to reach the relevant section quickly, while still checking symbols, labels, and units carefully.
Use a three-step lookup routine
1. Diagnose the task before opening the booklet. Identify the quantity, structure, or relationship being tested. Circle or mentally note the command term, given values, required output, and units.
2. Retrieve only the necessary resource. Locate the relevant equation, constant, table, or diagram. Avoid browsing multiple pages without a clear purpose because this consumes time and increases the chance of choosing irrelevant information.
3. Apply and interpret. Substitute values, show working, calculate with appropriate precision, and then state what the result means biologically. For explanation questions, use the booklet as evidence rather than copying labels from it.
Build a personal location map during revision
You cannot annotate the examination copy, but you can make a separate location map while studying. Record each section’s purpose and practise finding it from a closed booklet.
Resource type
What to learn before the exam
What to check during the exam
Equation
Appropriate situations and variable meanings
Exact form, symbols, and required units
Constant
Biological significance and likely application
Value, unit, and order of magnitude
Diagram
Process and relationships shown
Labels, direction, scale, and conventions
Table
Variables and patterns represented
Headings, units, conditions, and footnotes
Do not memorize page numbers alone because official formatting can change. Memorize the section and visual location, then confirm it using the clean booklet provided.
Worked examples of efficient resource use
Example 1: Magnification
Suppose a cell image is 48 mm long and represents an actual cell length of 12 μm. An experienced solver first recognizes a magnification problem, recalls or locates the relationship, and converts the values into the same units.
Since 48 mm equals 48,000 μm:
magnification = 48,000 μm ÷ 12 μm = ×4000
The important step is not pressing divide on the calculator. It is noticing that millimetres and micrometres cannot be used together without conversion. Writing the conversion also makes the reasoning clear if follow-through marks are available.
Example 2: Percentage change
A population increases from 240 to 300 individuals. The change is 60, so:
percentage change = (60 ÷ 240) × 100 = 25%
A common error is dividing by 300, the final value. Experienced solvers identify the reference value before entering anything into the calculator and finish with both the percentage sign and the direction of change.
Example 3: Using a supplied diagram
If a question supplies or references a physiological diagram, do not simply reproduce its labels. A command such as explain requires causal reasoning: identify the relevant structure, state what changes, and connect that change to its biological consequence.
For example, referring to a valve’s location is only descriptive. Explaining that the valve prevents backflow, thereby maintaining one-way movement and an effective pressure gradient, answers why the structure matters.
Using a calculator or GDC correctly
The current examination instructions require a calculator, but that does not mean every calculation needs advanced graphing functions. A permitted scientific calculator is often sufficient for arithmetic, powers, logarithms, and scientific notation, while an approved graphic display calculator (GDC) may provide additional statistical functions.
Before the examination:
confirm that your model is permitted for your session;
install any required examination mode or operating-system update;
clear prohibited stored material as directed by your school;
know how to enter scientific notation, logarithms, powers, and statistics;
bring working batteries or follow your school’s charging arrangements.
In the examination, write down the equation and substitution before recording the answer. A calculator display is not evidence of method, and unexplained output can conceal an incorrect operation. Retain extra digits during working and round only the final answer unless the question instructs otherwise.
How to practise under timed conditions
Reading notes about a booklet is not enough. Use the correct resource conditions when completing official IB sample examination papers: no Biology booklet for a 2025-syllabus paper, and the official booklet for practice designed for the 2028 arrangements.
After each calculation or resource-based question, record the cause of any lost time:
failure to recognize the required equation;
slow location of a reference;
incorrect unit conversion;
calculator-entry error;
premature rounding;
failure to interpret the numerical result.
The IB Biology Questionbank is useful for targeted practice, while water potential questions provide focused work with quantitative biological reasoning. Use IB Biology flashcards for variable meanings, units, and conceptual recall rather than trying to learn calculations only by recognition.
Worked solutions are especially valuable because they reveal the order of decisions: what the solver notices, when the calculator is used, which working is written, and how the result is checked. RevisionDojo’s Biology videos and worked solutions can be paired with each question attempt. Complete the problem independently first, then compare your method with the solution rather than watching passively.
Using resources from the wrong syllabus year. A 2028 Biology booklet does not apply automatically to 2026 or 2027 examinations.
Treating the booklet as a substitute for learning. It supplies reference information, not complete biological explanations.
Searching before diagnosing the question. Decide what you need before opening a reference section.
Ignoring units. Convert values before substitution and include the correct unit in the answer.
Copying calculator output. Show the relationship, substitution, and sensible rounding.
Practising with personal annotations. The 2028 examination copy will be clean.
Relying on outdated calculator rules. Follow the instructions for your examination session and paper.
Conclusion
For examinations in 2026 and 2027, IB Biology students should prepare without expecting a separate Biology formula or data booklet, while bringing a calculator that complies with current instructions. From first assessment 2028, students will use a clean Biology data booklet and should practise rapid retrieval, correct application, unit handling, and biological interpretation.
Efficient resource use is learned through repeated exam-style decisions, not by reading the booklet once. RevisionDojo can support this practice through the Biology Questionbank, Jojo AI feedback, timed papers, and per-question video solutions, so begin with targeted questions before progressing to complete mock papers.
Sarah holds a PhD in Cell Biology and taught IB Biology across Europe and Asia for 18 years, latterly as a science department lead. Outside of the papers, her focus lies with the Biology EE, especially with its new format, closing the gap between understanding and application.
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