IB Biology HL 2.2.11 External factors Question Bank
Practise IB Biology HL 2.2.11 by applying external factors concepts to exam-style questions.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- identify the relevant biological structure, process or evidence
- apply the correct biological mechanism to the question
- evaluate the result using data, adaptation or ecological reasoning
D2.2.11 (HL)—External factors question 1
The diagram shows a nucleosome from the nucleus of a eukaryotic cell.
Explain the role of lactose in the expression of the gene for lactase production.
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