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Practice · Biology · 2025 syllabus · D1.2

IB Biology D1.2 Protein synthesis: practice questions

5 exam-style questions on D1.2 Protein synthesis, SL and HL, 1 marked HL: 3 multiple choice, 1 short answer and 1 extended response. Each one comes with the mark scheme, a model answer and the reasoning behind every mark. Free with your email.

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The 5 questions in D1.2

  1. D1.2-01 From template to polypeptidePaper 1A style · multiple choice · 1 mark
  2. D1.2-02 Degeneracy of the codePaper 1A style · multiple choice · 1 mark
  3. D1.2-03 Mature mRNA leaving the nucleusPaper 1A style · multiple choice · 1 mark · HL
  4. D1.2-04 Reading an mRNAPaper 2 style · short answer · 8 marks
  5. D1.2-05 From gene to proteinPaper 2 style · extended response · 15 marks

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Every Biology and Chemistry question here is original, written for practice in the style of the papers set since the 2025 syllabus, with invented data. Developed independently from the International Baccalaureate Organization, which has not endorsed it. Found a mistake? Email vytis@limeadmissions.com with the question id.