The British Biology Olympiad (BBO) is a short, online biology competition for sixth-form and high-school students, run by UK Biology Competitions (UKBC) under the Royal Society of Biology. It rewards applying biology to unfamiliar problems rather than rote recall, runs in January, has no lab component, and gives awards by score — Gold, Silver, Bronze and further tiers.
What the BBO actually is
The BBO is one of the most widely sat biology competitions for school students. It is organised by UK Biology Competitions (UKBC), a body associated with the Royal Society of Biology (a registered charity). The point of the exam is not to test how much you can memorise — it is to test whether you can take what you know and apply it to problems you have never seen before. Questions lean on biological reasoning, data interpretation and logic, which is why strong students sometimes describe it as “an exam you cannot fully revise for.”
Last year, more than 15,000 students from over 900 schools took part, which gives you a sense of both the scale and the competition. It is a normal, well-trodden step for students with a serious interest in biology, medicine or the life sciences — not a niche event reserved for a handful of specialists.
The format: a short online exam, no lab
The BBO is sat entirely as a short online exam. There is no practical or lab component — you do not handle equipment or run experiments. The questions come in three styles: multiple-choice, fill-in, and ordering (putting items into the correct sequence). Because it is online and time-pressured, speed and accuracy matter as much as raw knowledge.
Who can enter
The BBO is aimed at sixth-form / high-school students with a strong interest in biology. For the exact eligibility that applies to you — year groups, the China-region route versus the UK home competition, and registration steps — you should confirm on the official BBO channels, because the rules differ by region and are set by the organiser. Registration is handled through your school rather than by individual sign-up in most cases, but again, confirm the current process officially.
For international and China-region students specifically, there is a dedicated route into the BBO that runs alongside the UK home competition. We cover how that works, and what a result means for students sitting outside the UK, in our guide on the BBO international / China-region exam.
When the BBO runs (2026)
The BBO is a January competition. For the 2026 season:
- China-region exam: 17 January 2026.
- UK home competition: 19–28 January 2026.
For any other year, or for the precise registration deadline and exam window that applies to you, confirm on the official channels — dates move from season to season and we never publish a value we have not verified.
What the BBO covers
The exam draws on seven core syllabus areas: cell biology; plant anatomy & physiology; animal anatomy & physiology; animal behaviour; genetics & evolution; ecology; and taxonomy. Together these map onto a strong A-level or AP biology course plus some first-year university material. You do not need graduate-level depth, but you do need broad, secure coverage, because the exam ranges widely and moves quickly. The standard preparation text is Campbell Biology, supported by AP and A-level resources.
How results work — and what a medal means
BBO awards are decided by score against published boundaries, not by ranking against everyone else on the day. The tiers are Gold, Silver, Bronze, followed by further recognition tiers such as Highly Commended and Commended. As a rough guide only, the 2024 boundaries were around 113 for Gold, 103 for Silver and 96 for Bronze — but these change every year, so treat them as illustrative and confirm the current boundaries officially.
A practical consequence of score-based awards: because the BBO shares roughly 90% of its content with the USA Biology Olympiad (USABO), which sits in late March, the same body of preparation can earn you results in both. In our own 2026 season, Hanlin’s biology cohort earned 26 BBO golds, 21 silvers and 5 bronzes, and 5 students reached the USABO US-region Semifinal (per our own records) — a pattern we lay out in the BBO-then-USABO double-gold strategy. Note one important distinction: the BBO selects the UK’s International Biology Olympiad (IBO) team through a separate, UK-based path, so international students take part for BBO recognition, not for a place on the UK IBO team.
How to start preparing
The fastest way to understand the exam is to sit a real one under time. We have collected a free BBO past-papers pack — papers, answer keys and topic notes, with worked-solution coverage that varies by year (our teachers add more over time). It is not an official download; it is our own gathered set. Scan the QR code on our past-papers page, or message us, to get it. Once you have papers in hand, our step-by-step BBO preparation guide shows how to turn them into a score, and the full competition rules page covers the formal details.
Frequently asked questions
What is the British Biology Olympiad?
It is a short online biology competition for sixth-form / high-school students, organised by UK Biology Competitions (UKBC) under the Royal Society of Biology. It rewards applying biology to unfamiliar problems rather than memorisation, and gives awards by score.
Does the BBO have a practical or lab exam?
No. The BBO is sat entirely as a short online exam with no lab component. Questions are multiple-choice, fill-in and ordering.
Who is eligible and how do I register?
It is aimed at sixth-form / high-school students with a strong interest in biology, with separate routes for the UK home competition and the China region. Confirm the exact year groups, eligibility and registration steps on the official BBO channels.
What does a BBO Gold mean?
Awards are decided by your score against published boundaries (Gold, Silver, Bronze and further tiers). As a 2024 guide the Gold boundary was around 113, but boundaries change each year — confirm the current ones officially.
This is an independent English-language guide to the British Biology Olympiad for international and China-region students, operated by Hanlin Education. It is not affiliated with, endorsed by, or sponsored by UK Biology Competitions (UKBC) or the Royal Society of Biology. Rules, dates, eligibility and results are set by the organiser — always confirm current details through the official BBO channels.