IB Biology SL, marked to the mark scheme.
Practise every topic on the SL specification and get each answer checked against the published scheme, point by point — with the wording that would have earned the marks you missed.
No card needed
Built for SL, not adapted to it.
IB Biology SL spans 4 topics, from Unity and diversity to Continuity and change, and Exaim covers all 34 subtopics — with practice written for the SL specification rather than adapted from another board's.
Biology is a subject of precise definitions: an answer that is nearly right in everyday words often earns nothing, because the mark scheme is waiting for one specific term. Exaim marks your written answers the way SL's own examiners do, one marking point at a time, so every question shows you where a real mark was won or lost.
What you get with every SL Biology course.
The same thing in every subject: real exam questions, marked properly, and a clear next step.
Marked like an examiner would
Write the answer in full and get it checked against your board’s published scheme, point by point, with the wording that would have earned each mark.
Built for your exact board
Not a generic summary written for everyone. Questions, notes and mark schemes all follow the specification you are actually sitting.
Practice, papers and timed mocks
Topic questions when you are learning something, full papers under exam conditions when you are ready to find out.
Handwritten work included
Photograph a written answer or a diagram and it is marked the same way — so you can revise on paper if that is how you work.
A plan that reorders itself
Every mark you drop becomes scheduled practice, so the weakest topic is always next and you never open the app wondering what to do.
How SL Biology practice actually works.
Not a video you watch. A question you answer, marked the way an examiner would.
01
Answer a real exam question
Type it, write it on paper and photograph it, or draw the diagram. Full sentences, the way you would in the exam.
02
It is marked point by point
Checked against your board’s published mark scheme, one mark point at a time — with the wording that would have earned the ones you missed.
03
Your plan moves
Every mark you drop becomes scheduled practice. The weakest topic is next, so you never open it wondering what to do.
Every SL Biology topic.
The whole IB specification, broken into the subtopics you actually revise and get tested on.
Unity and diversity
6- Water
- Nucleic acids
- Cell structure
- Diversity of organisms
- Evolution and speciation
- Conservation of biodiversity
Form and function
9- Carbohydrates and lipids
- Proteins
- Membranes and membrane transport
- Organelles and compartmentalization
- Cell specialization
- Gas exchange
- Transport
- Adaptation to environment
- Ecological niches
Interaction and interdependence
8- Enzymes and metabolism
- Cell respiration
- Photosynthesis
- Neural signalling
- Integration of body systems
- Defence against disease
- Populations and communities
- Transfers of energy and matter
Continuity and change
11- DNA replication
- Protein synthesis
- Mutation and gene editing
- Cell and nuclear division
- Water potential
- Reproduction
- Inheritance
- Homeostasis
- Natural selection
- Stability and change
- Climate change
Studying the other level?
Biology is covered at both SL and HL. The specifications differ, so the practice does too.
Common questions.
How is IB Biology SL marked on Exaim?
You write a real exam-style answer and it is marked against SL's published mark scheme, point by point — the same marking points an examiner uses. You see exactly which points you earned, which you missed, and the wording that would have earned them.
How many topics does IB Biology SL cover?
The whole specification: 4 topics, from Unity and diversity to Continuity and change, broken into 34 subtopics you revise and get tested on. Every one has practice, and the full list is on this page.
Is this built for SL, or a generic biology course?
Built for SL. The questions, the topics and the marking all follow the SL specification — not one generic biology course with a different level name on the front.
Can I try IB Biology SL for free?
Yes — start free with no card. You can practise Biology questions and see exactly how the marking works before you decide anything.
I sit a different level — is Biology covered for others?
Yes. IB Biology is covered for HL too, each built for that level's own specification. The links are further up this page.
Start IB Biology SL free.
Practise a few questions and see how the marking works before you decide anything.
- No card needed
- Pro is $9.99/month or $99/year
- Every subject included