Finding official SBO papers can sometimes be tricky as they are not always compiled in a single public repository. Here are the best places to look:

Most Junior Colleges (JCs) and Integrated Programme (IP) schools have internal "Olympiad Training" folders. If you are a student, your biology department is your best bet for a curated collection of papers from the last decade.

Specifically the endocrine system, neurobiology, and the intricacies of the immune response.

The Theory Test (Part A) is a race against the clock. Practicing with real papers helps you calibrate your reading speed. Where to Find Singapore Biology Olympiad Past Papers

Understanding cladograms and the characteristics of different phyla is essential for the practical rounds. Transitioning from Theory to Practical

If your performance on past theory papers is strong enough to earn you a spot in the Top 100-200, you will be invited to the .