This is the "Bible" of the Olympiad. You should not just read it; you should know the diagrams and experimental sections inside out.
Since SBO/SJBO papers are restricted, you can find high-quality alternatives and partial resources here: singapore biology olympiad past papers full
Do not underestimate the physical copy. The National Institute of Education (NIE) Library and NUS Central Library keep physical archives of olympiad training materials from the late 1990s and early 2000s. You cannot check them out, but you can scan 20+ pages at the photocopier. These vintage papers often have the rigorous “full” experimental design questions that modern papers have simplified. This is the "Bible" of the Olympiad
Singapore Biology Olympiad (SBO) is a premier competition for Pre-University students, while the Singapore Junior Biology Olympiad (SJBO) The National Institute of Education (NIE) Library and
If you have typed this into Google, you know the struggle. Unlike school exam papers, full, official SBO papers are notoriously difficult to find. This guide will not only tell you where to find them but also how to use them effectively to guarantee a top percentile score.
Take a past paper without a time limit to identify which modules (e.g., Biosystematics vs. Cell Biology) are your weakest.