Over 48 potential questions (worth 146 marks) based on the 2025 scientific article for Edexcel A-Level Biology A (SNAB)! This booklet is designed to help students familarise themselves and prepare for question 8 of Paper 3! This booklet comes with: Article summary which explains the main themes and ideas of the article. Paragraph-by-paragraph breakdown which links each paragraph to a specific topic from the SNAB spec. Practice questions which mimicks previous SNAB questions, covering a range of topics such drug development, neurotransmission, homeostasis, genetics, evolution, designing investigative procedures, data interpretation and statistical tests. Mark scheme included as a seperate document, written the the style of previous SNAB mark schemes.