Free IB Biology Practice Tests (2026)
Start with the free diagnostic to see where you stand, then practice in tutor or timed mode. Full-length simulations match the real IB Biology.
Diagnostics
IB Biology Practice Test 1
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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IB Biology Practice Test 2
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 3
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
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10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 11
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 12
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 13
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 14
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testIB Biology Practice Test 15
10 questions · 68 min10 free IB Biology practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Start testHow these IB Biology practice tests match the real exam
The real IB Diploma Programme Biology Exam (SL/HL) has 40 questions and a 270-minute time limit. Question types: Paper 1A: four-option multiple choice (SL 30, HL 40; no penalty for wrong answers). Paper 1B: four data-based questions on experimental work. Paper 2: Section A data-based and short-answer questions; Section B extended-response questions (SL answer 1 of 2, HL 2 of 3). Plus an internally assessed scientific investigation (20%). Each practice test here uses the same question formats, so you get used to how IB Biology questions are asked before test day.
The tests draw on every IB Biology content area, weighted like the official outline:
- Unity and diversity (about 18% of the exam)
- Form and function (about 22% of the exam)
- Interaction and interdependence (about 27% of the exam)
- Continuity and change (about 33% of the exam)
Use tutor mode to see the explanation after each answer, or timed mode to practise at real exam pace. Every answer comes with an explanation of why it is right and why the other options are wrong.