AQA A Level Biology Paper 2 2025 Mark Scheme Pdf

Download the official AQA A-Level Biology Paper 2 mark scheme for the June 2025 exam (7402/2). This is the final examiner-approved marking guide used during standardisation, containing full answers, detailed marking points, and examiner guidance on how marks are awarded.

The mark scheme provides complete solutions for every question in the paper. For example, Question 1 outlines respiration processes such as glycolysis with key answers including cytoplasm, phosphorylation, pyruvate, and NAD (page 5). Question 2 explains homeostasis and negative feedback, including how pH is regulated and returned to a set point (pages 7–8). Practical and calculation questions include calorimetry (Question 3, page 9 with correct answer ≈7.6 kJ g⁻¹) and statistical analysis using chi-squared tests (Question 7, pages 17–18).

It also includes detailed marking criteria for extended-response questions such as gene therapy evaluation (Question 4, page 11), ecology and succession (Question 10, pages 21–23), and genetics including autosomal linkage and inheritance. The mark scheme explains key examiner principles such as level-based marking, alternative acceptable answers, and the “own figure rule” for calculations.

This resource is essential for understanding how to gain full marks, structure high-level answers, and avoid common mistakes. Fully updated for the 2025/2026 academic year and optimised for instant download on markscheme.net.

This mark scheme is essential for Year 13 students preparing for the 2026 AQA A-Level Biology exams who want to understand exactly how examiners award marks and what is required for top-grade answers. It is particularly useful when used alongside the Paper 2 question paper for full exam practice.

Teachers and tutors use this resource to standardise marking, deliver precise feedback, and model high-quality responses. It is also ideal for independent learners and retake candidates who need detailed step-by-step answers and insight into examiner expectations across complex Biology topics.