IB Study Guide 2026

Everything you need to pass the IB exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

📋 IB Exam Format at a Glance

Questions

90 min

Time Limit

60%

Passing Score

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📚 IB Topics to Study (69)

Biology · 11 cards Chemistry · 11 cards Mathematics · 11 cards Approaches to Learning (ATL) · 7 cards Approaches to Learning (ATL) · 7 cards Approaches to Learning (ATL) · 7 cards Approaches to Learning (ATL) · 7 cards Biology · 7 cards Biology · 7 cards Biology · 7 cards Biology · 7 cards Chemistry · 7 cards Chemistry · 7 cards Chemistry · 7 cards Chemistry · 7 cards CP Core: Reflective Project · 7 cards CP Core: Reflective Project · 7 cards CP Core: Reflective Project · 7 cards CP Core: Reflective Project · 7 cards Diploma Programme Subject Groups · 7 cards Diploma Programme Subject Groups · 7 cards Diploma Programme Subject Groups · 7 cards Diploma Programme Subject Groups · 7 cards DP Core: CAS Stages · 7 cards DP Core: CAS Stages · 7 cards DP Core: CAS Stages · 7 cards DP Core: CAS Stages · 7 cards DP Core: The Extended Essay · 7 cards DP Core: The Extended Essay · 7 cards DP Core: The Extended Essay · 7 cards

See all 69 topics as flashcards →

✍️ Sample IB Questions & Answers

1. What is the coefficient of x³ in the expansion of (2 + x)⁵?

✓ 80

C(5,3)·2²·x³ = 10·4·x³ = 40x³ — wait, C(5,3)·2²·1³ = 10·4 = 40... recalculating: C(5,2)·2³ = 10·8 = 80.

2. What is the significance of the semi-conservative replication model demonstrated by Meselson and Stahl?

✓ Each new DNA molecule retains one original strand and one newly synthesized strand

The Meselson-Stahl experiment showed that after one round of replication each daughter double helix contains one parental strand and one newly made strand.

3. The IB DP Language ab initio course is offered exclusively at which level?

✓ Standard Level only

Language ab initio is designed for true beginners and is only available at Standard Level within Group 2.

4. What is the sum to infinity of the geometric series 12 + 4 + 4/3 + … ?

✓ 18

r = 1/3 and a = 12; S∞ = a/(1−r) = 12/(1 − 1/3) = 12/(2/3) = 18.

5. How does the sodium-potassium pump contribute to the resting membrane potential of a neuron?

✓ It moves 3 Na⁺ out and 2 K⁺ in, creating a net negative interior

The pump actively transports 3 sodium ions out and 2 potassium ions in per cycle, maintaining a net negative charge inside the neuron.

6. Which statement about the IB DP Group 5 mathematics courses is accurate?

✓ Mathematics AA is more focused on pure mathematical reasoning and proof than Mathematics AI

Mathematics: Analysis and Approaches emphasizes mathematical rigor, proof, and abstract reasoning, while Applications and Interpretation focuses on statistics and modeling.

🎯 Free IB Practice Tests

Chemistry · 11 questions Mathematics · 11 questions Biology · 11 questions IB Physics · 7 questions CP Core: Reflective Project · 7 questions DP Core: CAS Stages · 7 questions CP Core: Reflective Project · 7 questions IB Physics · 7 questions IB Physics · 7 questions CP Core: Reflective Project · 7 questions

📖 IB Guides & Articles

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