Biology · Paper 1B · HL
May 2025 TZ3
A video for every question in the Biology Paper 1B HL paper from May 2025 TZ3. Each one goes through the question and the thinking behind it, so you can see where your approach differed. Attempt the paper first, then use the grid to jump to whichever questions you need.
Question 1
Question 2
Question 3
Question 4
About this paper
Biology Paper 1B at HL has 4 questions and is sat under exam conditions. It covers recall and application across the core syllabus; HL papers add the higher level material on top of the core.
Studying this paper
Don't work through the videos in order. Mark your attempt, then watch only the questions you missed plus the ones you got right on a guess, those are the ones most likely to cost you marks for real. If the misses cluster in one topic, go back to the theory before starting another paper.