19 papers, 2017–2025 · WBI14
Advanced topics including photosynthesis, ecology and the environment, microbiology, immunity and forensics. Every Biology Unit 4 A-Level question paper and mark scheme in the collection is listed below, from Edexcel. No sign-up is required.
Work through Unit 4 papers in timed conditions, then mark your own work against the official mark scheme before looking at any worked solution. Because every sitting of Unit 4 assesses the same specification content, the same question forms recur across years with different numbers and context - so a method you get right once will earn marks again.
Keep a record of which questions cost you marks and why: a gap in knowledge, an arithmetic slip, or running out of time. Each needs a different fix, and the pattern across several Unit 4 papers tells you which one is actually holding your grade down.