AQA A Level Biology Paper 3 2025 Question Paper Pdf

Get the official AQA A-Level Biology Paper 3 question paper from the June 2025 series (7402/3), sat on Wednesday 18 June 2025 (morning). This is the exact examiner-set paper used in the live exam, featuring Section A structured and data-analysis questions and Section B essay options.

Section A assesses a wide range of synoptic Biology topics and practical skills. For example, Question 1 includes microbiology and respiration concepts such as binary fission and ATP synthase inhibition (pages 3–5). Question 2 covers kidney function and homeostasis, including nephron structure and glomerular filtration (page 6). Question 3 focuses on ecology and population estimation using mark–release–recapture (Table 2 on page 10), while Question 4 includes protein structure and immune response calculations (page 12–14, including antibody production calculations).

The paper also tests advanced data interpretation and evaluation skills. For instance, Question 5 evaluates a genetic “two-hit” model involving CDH1 methylation (page 16 with Figure 4), and Question 6 integrates physiology, lung disease, and spirometry calculations (pages 19–22, including helium dilution equation and clinical trial analysis shown in Figure 6).

Section B requires students to write a 25-mark essay on one of two synoptic topics: either the importance of condensation and hydrolysis reactions, or responses to internal and external environmental changes (page 24). This makes Paper 3 essential for developing high-level analytical, evaluative, and essay-writing skills required for top grades.

Pair this paper with the official mark scheme for full examiner-standard revision. Fully updated for the 2025/2026 academic year and optimised for instant download on markscheme.net.

This paper is essential for Year 13 students preparing for the 2026 AQA A-Level Biology exams, especially those aiming for top grades in Paper 3 which tests synoptic understanding, practical skills, and essay writing. It is also ideal for retake candidates and independent learners needing authentic exam-style practice.

Teachers and tutors use this paper for mock exams, timed practice, and essay training. It is particularly useful for developing data analysis, evaluation, and extended writing skills required for high-mark Biology responses.