OCR A Level Biology A Paper 1 2025 Question Paper

Get the official OCR A-Level Biology A H420/01 Biological Processes June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains multiple-choice, structured, practical-skills, respiration, photosynthesis, transport, gas exchange, cardiovascular physiology, and plant-response questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on enzymes, endocrine communication, aerobic respiration, glycolysis, phosphofructokinase inhibition, photosynthetic pigments, thin layer chromatography, gibberellins, algal photosynthesis experiments, cardiovascular physiology, ECG interpretation, haemoglobin structure, fish gills, open circulatory systems, and transport in mammals. Pair it with the matching OCR H420/01 June 2025 mark scheme on markscheme.net for complete examiner-style revision and exam preparation. Updated for the 2025/2026 academic year, mobile-friendly, and instantly downloadable from markscheme.net.

This document is designed for OCR A-Level Biology A students preparing for the 2026 examination series, Year 13 learners studying Biological Processes, retake students targeting top grades, and home-schooled candidates seeking authentic OCR exam practice under timed conditions.

It is also ideal for teachers, private tutors, revision-course providers, and parents supporting Biology revision at home. The question paper can be used for mock examinations, respiration revision, practical-skills preparation, physiology analysis, and OCR exam-technique training.