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11:48 PM
Help me understand ETC.
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01Ask

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Syllabus C1.2.14

Oxygen acts as the terminal electron acceptor, which maintains the proton gradient.

Keywords that earn marks
02Learn

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Built on expert-crafted IB content, our AI delivers syllabus-aligned explanations focused on the concepts and keywords that earn marks.

Recommended practice
C1.2 Q32Proton pumping in the ETC→
C1.2 Q18Forming the proton gradient→
C1.2 Q34When the ETC is blocked→
03Practice

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Every answer leads to practice. Our AI recommends relevant questions from our IB Question Bank, helping you apply what you’ve learned and master each concept.

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Expert-crafted Question Bank.

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Our Question Bank is carefully developed by experienced IB educators, prioritising quality over quantity. Every question is designed to provide meaningful, exam-focused practice.

Our questions are reviewed and refined with insights from students who achieved a perfect 45/45 in the IB Diploma, incorporating the strategies and approaches behind their success.

Go beyond simply studying topics. Explore recurring question types and problem-solving approaches within each unit, helping you recognise patterns and approach IB exam questions with confidence.

Need more practice? Our AI Question Builder generates additional questions based on your selected exam pattern, allowing you to reinforce your understanding and practise challenging concepts.

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Our Philosophy

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We believe great IB questions should feel like the real exam. Our goal isn’t to create the largest question bank. It’s to create the questions students actually need.

From challenging Mathematics Paper 3 problems to experimental and data-based questions in the sciences, we focus on the areas where students need meaningful practice the most.

Every question is carefully crafted, reviewed, and refined to reflect the style, difficulty, and reasoning expected in real IB examinations. Quality always comes before quantity.

We continuously review our content against evolving IB exam trends. Questions that no longer reflect how the IB assesses students are replaced with better ones.

Our ultimate goal is simple: to create questions so authentic that students can barely distinguish them from real IB exam questions.

Our Team

Chul

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Yonsei University College of Medicine

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IB Diploma Score: 43/45
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