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  1. A Level
  3. Biology OCR A

Biology

Spec H420

Free OCR A A Level Biology revision: 678 exam-style questions and past papers from 2018–2025 with mark schemes.

Module 1: Development of practical skills in biology

Practical skills assessed in a written examination

Practical skills assessed in the practical endorsement

Module 2: Foundations in biology

Foundations in biology

Module 3: Exchange and transport

Exchange and transport

Module 4: Biodiversity, evolution and disease

Communicable diseases, disease prevention and the immune system

Biodiversity

Module 5: Communication, homeostasis and energy (A-level only)

Communication and homeostasis

Energy for biological processes

Module 6: Genetics, evolution and ecosystems (A-level only)

Genetics and evolution

Cloning and biotechnology

Ecosystems

Assessment at a glance

AssessmentFormatDurationMarksWeighting
Paper 1Written exam2h 15m100 marks37%
Paper 2Written exam2h 15m100 marks37%
Paper 3Written exam1h 30m70 marks26%
Practical endorsementNon-exam assessment——Pass/fail

Course aims & skills

OCR A A Level Biology builds the skills examiners reward. By the end of the course you should be able to:

  • recall scientific facts, terms, definitions and units
  • apply knowledge and understanding to unfamiliar situations
  • interpret, analyse and evaluate experimental data
  • plan investigations and evaluate methods and conclusions
  • carry out the required practicals and describe the techniques
  • use and rearrange equations, and work with significant figures
  • process data with appropriate maths skills
  • construct and read graphs, tables and diagrams
  • build and communicate evidence-based scientific arguments

Frequently Asked Questions