IB Diploma HL · International Baccalaureate

Biology DP

Biology DP revision notes for IB Diploma HL.

In this subject

Explore Biology

Explore 24 topic notes, learning objectives and practice.

2023 guide (first exams 2025)

SL/HL

Water and its properties6 learning objectives · 6 practice questions
Free sample
Nucleic acids: DNA and RNA structure6 learning objectives · 6 practice questions
Included in paid plans
Cell structure, microscopy and the origin of cells6 learning objectives · 6 practice questions
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Diversity of organisms, classification and viruses6 learning objectives · 6 practice questions
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Evolution, natural selection and speciation6 learning objectives · 6 practice questions
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SL/HL

Carbohydrates, lipids and proteins6 learning objectives · 6 practice questions
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Membranes, membrane transport and water potential6 learning objectives · 6 practice questions
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Organelles, compartmentalisation and cell specialisation6 learning objectives · 6 practice questions
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Gas exchange in animals and plants6 learning objectives · 6 practice questions
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Transport in plants and animals6 learning objectives · 6 practice questions
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SL/HL

Enzymes and metabolism6 learning objectives · 6 practice questions
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Cell respiration6 learning objectives · 6 practice questions
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Photosynthesis6 learning objectives · 6 practice questions
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Neural signalling and muscle contraction6 learning objectives · 6 practice questions
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Integration of body systems and chemical signalling7 learning objectives · 12 practice questions
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Defence against disease6 learning objectives · 6 practice questions
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Ecological niches, populations and energy flow in ecosystems6 learning objectives · 7 practice questions
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SL/HL

DNA replication, mutation and gene editing6 learning objectives · 7 practice questions
Included in paid plans
Protein synthesis and gene expression6 learning objectives · 7 practice questions
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Cell and nuclear division6 learning objectives · 7 practice questions
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Reproduction in plants and animals6 learning objectives · 7 practice questions
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Inheritance and genetic variation6 learning objectives · 7 practice questions
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Homeostasis, thermoregulation and the kidney6 learning objectives · 7 practice questions
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Conservation of biodiversity, ecosystem stability and climate change6 learning objectives · 7 practice questions
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158 practice questions across 24 topics. Free accounts practise with 20 sample questions in this subject; paid plans include every question.