2019 OCR A level Biology A past papers
Specification H420
June grade boundaries & calculatorQuestion papers, mark schemes and examiner reports for OCR A level Biology A (H420) · 2019. Links open the official exam-board files.
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2019 · June
Official whole-qualification boundaries. These percentages aren't individual-paper grades.
Biological diversity
H420/02
Paper correction · Q13
Q13: use superscripts in the Hardy–Weinberg equation: p² + 2pq + q² = 1.
Official correctionUnified biology
H420/03
Biological processes
H420/01
Examiner reportAwaiting checksMissing material · Q4: blood-cell image
The published paper omits the blood-cell micrograph labelled P and Q, needed for Q4. Q5 also refers to this image; check which information its stem provides before using it for practice.
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For verified links, we have checked the exam series, paper and resource type. Links marked Check pending appear in official listings, but those details still need checking. Other rows and supporting files still need research. “Awaiting checks” does not mean the exam board has withheld or removed a file.