Eggzams / IB exam practice questions / IB Biology
IB Diploma Programme
IB Biology practice questions, by topic
Eggzams has 1,241 original IB Biology questions for IB Diploma Programme, organised into 17 topics. Topics include A1 Molecules: Water and Nucleic Acids, A2 Cells: Origins of Cells, Cell Structure and Viruses, A3 Organisms: Diversity, Classification and Cladistics, A4 Ecosystems: Evolution, Speciation and Conservation of Biodiversity and B1 Molecules: Carbohydrates, Lipids and Proteins. Every question has an explanation after you answer, so a wrong answer becomes a mini-lesson.
Sample IB Biology questions
Here is the kind of question you will get, with the explanation that follows every answer. These are free in the app.
IB Biology · A3 Organisms: Diversity, Classification and Cladistics
As you move down the classification hierarchy, from domain towards species, the number of organisms included within each successive group generally:
- Increases, as each level becomes more specific
- Decreases, as each level becomes more specific
- Remains exactly the same at every level of the hierarchy
- Has no relationship whatsoever to the level of the hierarchy
Each level down the hierarchy narrows the group to organisms sharing more specific characteristics, so the number of organisms included generally decreases at each more specific level.
IB Biology · D4 Ecosystems: Natural Selection, Stability and Climate Change
Which feature helps make an ecosystem stable?
- Low species diversity
- Loss of keystone species
- Open nutrient cycles with continuous loss of nutrients
- High biodiversity and negative feedback loops
Stable ecosystems have high biodiversity, nutrient cycling and negative feedback mechanisms that restore equilibrium.
IB Biology · A2 Cells: Origins of Cells, Cell Structure and Viruses
According to cell theory, the cell is considered the basic unit of life mainly because it:
- Is the smallest structure that can independently carry out all the functions of life
- Can only be found in multicellular organisms
- Is always visible to the naked eye without a microscope
- Never requires any energy to survive
A cell is the smallest structure that can independently carry out all the functions necessary for life, such as metabolism and reproduction.
Topics covered: 17 topics, 1,241 questions
IB Biology on Eggzams is split into the topics below, so you can drill exactly the part you find hardest instead of working through a textbook in order. Each topic has its own progress tracker.
- A1 Molecules: Water and Nucleic Acids
- A2 Cells: Origins of Cells, Cell Structure and Viruses
- A3 Organisms: Diversity, Classification and Cladistics
- A4 Ecosystems: Evolution, Speciation and Conservation of Biodiversity
- B1 Molecules: Carbohydrates, Lipids and Proteins
- B2 Cells: Membranes, Organelles and Cell Specialization
- B3 Organisms: Gas Exchange, Transport and Muscle
- B4 Ecosystems: Adaptation to Environment and Ecological Niches
- C1 Molecules: Enzymes, Cell Respiration and Photosynthesis
- C2 Cells: Chemical and Neural Signalling
- C3 Organisms: Integration of Body Systems and Defence Against Disease
- C4 Ecosystems: Populations, Communities and Energy Transfers
- D1 Molecules: DNA Replication, Protein Synthesis and Mutations
- D2 Cells: Cell Division, Gene Expression and Water Potential
- D3 Organisms: Reproduction and Inheritance
- D3 Organisms: Homeostasis, Osmoregulation and Thermoregulation
- D4 Ecosystems: Natural Selection, Stability and Climate Change
How to practise IB Biology with Eggzams
Pick one topic, answer a short run of questions, and read the explanation after every answer, right or wrong. Repeat the topics where your accuracy is lowest. Questions come in easy, medium and hard, so you can build up in each topic and see the difficulty rise as you improve.
Try 5 questions in every topic, free
Create a free account to start. One $9.99 payment unlocks everything, with no subscription, ever.
Frequently asked
How many IB Biology practice questions does Eggzams have?
1,241 original questions across 17 topics, each with an explanation.
Are these real IB Biology past paper questions?
No. Every question is written from scratch and checked against the current syllabus. Eggzams never copies or reproduces past exam papers.
Is IB Biology practice free?
The first 5 questions in every topic are free once you create a free account. A one-time payment of $9.99 unlocks everything in the app, with no subscription.
Is Eggzams affiliated with the International Baccalaureate Organization?
No. Eggzams is an independent study aid, not affiliated with, authorised by, or endorsed by the International Baccalaureate Organization.
Also studying for other subjects?
Eggzams