IB Biology Past Papers by Topic

Start with one Biology topic

Choose the topic where your last test or paper exposed a gap: molecules and cells, organisms and body systems, information and inheritance, or populations and ecosystems. A focused set makes the missing idea easier to name than a full paper does.

Practise HL and SL from the bank that matches your course. Do not treat a familiar-looking question as mastered until you can explain the biological process and apply it to unfamiliar data.

Use the markscheme precisely

Biology marks often depend on a named structure, relationship, comparison, or command term. After attempting the question, identify the first missing marking point rather than only checking the final conclusion.

Record the correction in one sentence, then save the question for a later mixed set. Move from topic practice to a paper or session filter once the same error stops recurring.

Build toward timed papers

Use the complete 2020 exam year as a free preview, then add newer papers when you need the full bank. Mix topics before a timed paper so you must select the relevant concept without being prompted by a topic label.

Close the loop

After marking, write the missed idea in your own words and return to a small mixed set a few days later. Keep a record of recurring command-term, data-analysis, and biological-process errors so your next paper tests a repaired weakness rather than repeating it.