Pearson Edexcel A Level Biology Paper 3 2025 Question Paper

Download the official Pearson Edexcel A-Level Biology A (Salters-Nuffield) Paper 3 question paper from the June 2025 examination series (9BN0/03). This examiner-authentic PDF contains the complete Paper 3 assessment used in the live Edexcel A-Level Biology examination. The paper covers General and Practical Applications in Biology, testing advanced biological knowledge, scientific reasoning, practical-investigation skills, data analysis, calculations, graph interpretation, and extended scientific explanation under real Edexcel exam conditions.

The paper includes questions on ecological succession following volcanic eruptions, pioneer species, nitrogen-fixing bacteria in root nodules, Stentor response investigations, fibrinogen and blood clotting, dysfibrinogenemia inheritance, atherosclerosis, RNA nucleotides, ribosomes, genetic-code experiments, bacteriostatic antibiotics, antibiotic resistance in E. coli, eDNA investigations, endemic frog populations, PCR analysis, ecological monitoring, and complementary molecular shapes in Biology.

Students are required to analyse graphs, interpret biological investigations, complete calculations, evaluate scientific evidence, explain experimental procedures, and apply biological concepts to realistic scientific contexts. Practical and analytical questions include antibiotic-testing procedures, bacterial-culture investigations, eDNA species identification, inheritance analysis, ecosystem monitoring, and statistical interpretation.

The examination also contains a large synoptic scientific-article section based on hibernation biology and torpor in mammals. Students must apply knowledge of metabolism, thermoregulation, neurotransmitters, gene expression, cardiovascular physiology, comparative genomics, adenosine signalling, hypothalamic control, and space-travel biology to unfamiliar scientific material adapted from New Scientist.

This 100-mark assessment features multiple-choice-style reasoning, short-answer responses, experimental-design tasks, graph analysis, practical-evaluation questions, and extended synoptic essays integrating concepts from across the A-Level Biology specification. It is ideal for timed practice, classroom revision, mock examinations, independent study, and advanced A-Level Biology preparation before the 2026 examination series.

Pair this paper with the matching Edexcel 9BN0/03 June 2025 mark scheme and examiner guidance on markscheme.net for complete examiner-standard revision and accurate self-assessment.

This document is designed for Pearson Edexcel A-Level Biology A (Salters-Nuffield) students studying the 9BN0 specification, especially Year 13 students preparing for the 2026 examination series who want authentic practice using official Edexcel assessment materials. It is particularly valuable for students aiming for high grades who need experience with synoptic Biology questions, experimental design, graph interpretation, data analysis, scientific-article application, and extended biological explanations under timed exam conditions.

The paper is also highly useful for Biology teachers, tutors, sixth-form colleges, revision centres, home-schooled learners, and retake candidates who require official Edexcel exam-standard resources for mock examinations, classroom assessments, practical-skills development, homework tasks, and structured revision programmes. It helps learners strengthen scientific reasoning, practical understanding, biological application, analytical skills, and exam technique before the 2026 A-Level Biology examinations.