OCR A Level Biology B Paper 3 2025 Question Paper

Get the official OCR A-Level Biology B (Advancing Biology) H422/03 Practical Skills in Biology June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains practical-skills, data-analysis, microscopy, respiration, microbiology, PCR, electrophoresis, genetics, plant biology, and statistical-analysis questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on monocot root transverse sections, xylem and phloem identification, colorimetry for starch concentration, salt effects on water uptake in tomato plants, respirometers and respiratory quotient calculations, germinating bean respiration investigations, electron micrograph drawings of Parakaryon myojinensis, Rhizobium culture methods, PCR cycles, qPCR fluorescent probes, electrophoresis of CYP17 alleles, and statistical analysis of alcohol consumption and microcephaly risk. Pair it with the matching OCR H422/03 June 2025 mark scheme on markscheme.net for complete examiner-style revision and practical-skills 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 B (Advancing Biology) students preparing for the 2026 examination series, Year 13 learners studying Practical Skills in Biology, retake students targeting A/A* 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 practical assessments, microscopy analysis, PCR and electrophoresis revision, statistical-analysis practice, and OCR exam-technique training.