It is a syllabus-organised set of IB Biology practice questions for the first-assessment 2025 course, arranged so you can move from theme to topic to learning objective.
IB Biology HL Question Bank
Use the IB Biology question bank to practise by theme, topic and learning objective, then check answers and mark-scheme reasoning as you revise.
Full syllabus coverageDifficulty filtersAnswers and mark schemes
Question Bank
Topic questions organised by syllabus area, with difficulty filters for focused practice.
MasteryFollow the syllabus roadmap and track what to learn, practise, and review.
ConceptRefresh the core ideas, explanations, and exam links behind each topic.
DocumentsOpen revision notes and supporting materials for the same course.
Frequently Asked Questions
Start with the SL or HL route that matches your course, then choose the theme, topic or objective you want to strengthen instead of jumping randomly between questions.
Attempt a focused set first, then open Show Answer to compare biological terms, data interpretation, calculations and explanation chains with the stored mark-scheme points.
Review the objectives where you lost marks, revisit nearby topic questions, and use the mark-scheme language to tighten how you explain processes, evidence and conclusions.