OCR A Level Biology A Unified Biology June 2025 mark scheme H420/03
Practise the past exam questions by topic
Surface area to volume ratio8 Qs
Xylem & phloem7 Qs
Nervous system5 Qs
Skeletal muscle contraction5 Qs
Immune system6 Qs
Genetic engineering13 Qs
Genetic fingerprinting5 Qs
Control of gene expression6 Qs
Osmosis6 Qs
Gene mutations5 Qs
Cell differentiation7 Qs
Spread of disease5 Qs
Specific immune response8 Qs
+9 more
7 questions
- Q1 - 9 marks - Surface area to volume ratio, Xylem and phloem
- Q2 - 9 marks - The nervous system
- Q3 - 12 marks - Skeletal muscle contraction, The immune system
- Q4 - 16 marks - Genetic engineering, Genetic fingerprinting, The control of gene expression
- Q5 - 5 marks - Osmosis
- Q6 - 8 marks - Gene mutations, Genetic engineering
- Q7 - 11 marks - Cell differentiation, Spread of disease, The immune system, The specific immune response
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