OCR A-Level Biology A topic list (H420)

Guide overview All 26 sections Sample questions Papers and weighting Look inside Questions and answers

Every section of OCR A-Level Biology A

26 sections, 151 subtopics and 1,833 questions, covering the whole of specification H420.

Module 1: Development of practical skills in biology

104 questions across 1 section

Practical Skills and Mathematical Requirements
104 questions · 6 subtopics
Component 01, Component 02, Component 03

Module 2: Foundations in biology

422 questions across 6 sections

Cell Structure
68 questions · 5 subtopics
Component 01, Component 02, Component 03
Biological Molecules
113 questions · 10 subtopics
Component 01, Component 02, Component 03
Nucleotides and Nucleic Acids
58 questions · 5 subtopics
Component 01, Component 02, Component 03
Enzymes
43 questions · 3 subtopics
Component 01, Component 02, Component 03
Biological Membranes
60 questions · 4 subtopics
Component 01, Component 02, Component 03
Cell Division, Cell Diversity and Cellular Organisation
80 questions · 6 subtopics
Component 01, Component 02, Component 03

Module 3: Exchange and transport

223 questions across 3 sections

Exchange Surfaces
64 questions · 5 subtopics
Component 01, Component 03
Transport in Animals
103 questions · 8 subtopics
Component 01, Component 03
Transport in Plants
56 questions · 5 subtopics
Component 01, Component 03

Module 4: Biodiversity, evolution and disease

210 questions across 3 sections

Communicable Diseases, Disease Prevention and the Immune System
88 questions · 8 subtopics
Component 02, Component 03
Biodiversity
70 questions · 6 subtopics
Component 02, Component 03
Classification and Evolution
52 questions · 5 subtopics
Component 02, Component 03

Module 5: Communication, homeostasis and energy

457 questions across 7 sections

Communication and Homeostasis
32 questions · 3 subtopics
Component 01, Component 03
Excretion as an Example of Homeostatic Control
110 questions · 9 subtopics
Component 01, Component 03
Neuronal Communication
56 questions · 5 subtopics
Component 01, Component 03
Hormonal Communication
47 questions · 4 subtopics
Component 01, Component 03
Plant and Animal Responses
80 questions · 7 subtopics
Component 01, Component 03
Photosynthesis
58 questions · 5 subtopics
Component 01, Component 03
Respiration
74 questions · 6 subtopics
Component 01, Component 03

Module 6: Genetics, evolution and ecosystems

417 questions across 6 sections

Cellular Control
62 questions · 6 subtopics
Component 02, Component 03
Patterns of Inheritance
89 questions · 7 subtopics
Component 02, Component 03
Manipulating Genomes
42 questions · 4 subtopics
Component 02, Component 03
Cloning and Biotechnology
120 questions · 10 subtopics
Component 02, Component 03
Ecosystems
52 questions · 4 subtopics
Component 02, Component 03
Populations and Sustainability
52 questions · 5 subtopics
Component 02, Component 03
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