IB DP Biology HL 2025
Exam Style Practice Questions topic wise for IB DP Biology HL 2025, New Syllabus details, Flashcards and Mock Questions
Exam Style Practice Questions, Notes and Past Paper for IB DP Biology HL 2025
Exam Style Questions
Past Papers (updated 2024)
Study Notes
Mock Tests (2024 updated)
Changes in Syllabus for IB DP Biology HL 2025
As per Assessment for New IBDP Biology, There will be only 2 papers
Paper 1A will have multiple-choice questions(MCQs).
paper 1B will have data-based questions , from across all themes.
Paper 2A will have data-based questions from unknown contexts and of short-answer questions.
Paper 2B will have extended-response questions covering holistic knowledge and understanding of a complete syllabus covered, skills acquired, concepts learnt and understandings developed.
Also these option topics are removed –(neurobiology and behaviour, biotechnology and informatics, ecology and conservation and human physiology).
Some content from these four options are incorporated into the course in either standard level or higher level.
Calculator is allowed in Paper 1 also.
Syllabus Framework for IBDP Biology First Assessment 2025
The biology syllabus is organized into four main themes, each divided into two subtopics. These themes provide a framework for understanding the course material
- Theme A: Unity and diversity
- Theme B: Form and function
- Theme C: Interaction and interdependence
- Theme D: Continuity and change
The arrangement of syllabus content follows four levels of biological organization, which also serve as conceptual lenses.
- Level 1: Molecules
- Level 2: Cells
- Level 3: Organisms
- Level 4: Ecosystems
Syllabus for IBDP Biology First Assessment 2025
A. Unity and diversity
- 1. Molecules
- A1.1 Water
- A1.2 Nucleic acids
- 2. Cells
- A2.1 Origins of cells [HL only]
- A2.2 Cell structure
- A2.3 Viruses [HL only]
- 3. Organisms
- A3.1 Diversity of organisms
- A3.2 Classification and cladistics [HL only]
- 4. Ecosystems
- A4.1 Evolution and speciation
- A4.2 Conservation of biodiversity
B. Form and function
- 1. Molecules
- B1.1 Carbohydrates and lipids
- B1.2 Proteins
- 2. Cells
- B2.1 Membranes and membrane transport
- B2.2 Organelles and compartmentalization
- B2.3 Cell specialization
- 3. Organisms
- B3.1 Gas exchange
- B3.2 Transport
- B3.3 Muscle and motility [HL only]
- 4. Ecosystems
- B4.1 Adaptation to environment
- B4.2 Ecological niches
C. Interaction and interdependence
- 1. Molecules
- C1.1 Enzymes and metabolism
- C1.2 Cell respiration
- C1.3 Photosynthesis
- 2. Cells
- C2.1 Chemical signaling [HL only]
- C2.2 Neural signaling
- 3. Organisms
- C3.1 Integration of body systems
- C3.2 Defence against disease
- 4. Ecosystems
- C4.1 Populations and communities
- C4.2 Transfers of energy and matter
D. Continuity and change
- 1. Molecules
- D1.1 DNA replication
- D1.2 Protein synthesis
- D1.3 Mutations and gene editing
- 2. Cells
- D2.1 Cell and nuclear division
- D2.2 Gene expression [HL only]
- D2.3 Water potential
- 3. Organisms
- D3.1 Reproduction
- D3.2 Inheritance
- D3.3 Homeostasis
- 4. Ecosystems
- D4.1 Natural selection
- D4.2 Stability and change
- D4.3 Climate change