HLSL

IB Biology HL practice questions, notes and revision

  • 41 topics
  • 4 levels
  • Paper 1 & 2
  • 2 topics free
Start a free topic →Unlock all · S$250
Grade 7 · May 2026TZ176TZ278TZ371All grade boundaries →

Biology HL revision tools

Practice questions4 levels · Paper 1 and 2Notes and cheatsheets41 topicsPast-paper analysisMarks by topicGrade boundariesEvery timezoneBiology IATopic ideas

Biology HL topics

Foundation Core Exam Challenge
★Tools & Inquiry

Unity and diversity

Theme A · 9 topicsA1.1WaterFreeA1.2Nucleic acidsFreeA2.1Origins of cellsA2.2Cell structureA2.3VirusesA3.1Diversity of organismsA3.2Classification and cladisticsA4.1Evolution and speciationA4.2Conservation of biodiversity

Form and function

Theme B · 10 topicsB1.1Carbohydrates and lipidsB1.2ProteinsB2.1Membranes and membrane transportB2.2Organelles and compartmentalizationB2.3Cell specializationB3.1Gas exchangeB3.2TransportB3.3Muscle and motilityB4.1Adaptation to environmentB4.2Ecological niches

Interaction and interdependence

Theme C · 9 topicsC1.1Enzymes and metabolismC1.2Cell respirationC1.3PhotosynthesisC2.1Chemical signallingC2.2Neural signallingC3.1Integration of body systemsC3.2Defence against diseaseC4.1Populations and communitiesC4.2Transfers of energy and matter

Continuity and change

Theme D · 12 topicsD1.1DNA replicationD1.2Protein synthesisD1.3Mutation and gene editingD2.1Cell and nuclear divisionD2.2Gene expressionD2.3Water potentialD3.1ReproductionD3.2InheritanceD3.3HomeostasisD4.1Natural selectionD4.2Stability and changeD4.3Climate change

Biology HL: common questions

How is Biology HL examined?

Paper 1 (1A multiple choice and 1B data-based questions), Paper 2 (short and extended answers), and the scientific investigation (IA), worth 20%.

What is free here?

Two full topics with every practice question and markscheme (A1.1 Water and A1.2 Nucleic acids), plus grade boundaries and past-paper analysis.

What do I get if I unlock the course?

All 41 topics for 12 months: notes, cheatsheets and practice questions in four levels for Paper 1 and Paper 2, each with a step-by-step markscheme. S$250.

Who writes the questions?

IB-certified teachers at Photon Academy, who have taught the IB Diploma since 2015. Every question is original, written to the IB command terms and mark allocation.

Ready when you are.Two Biology HL topics are free, no card needed.
Start free →Unlock · S$250

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