A1.2.9—Diversity of DNA base sequences
DNA stores vast amounts of information because base sequences can vary in length and order across genes, genomes, and organisms.
- Syllabus
- First assessment 2025
- Objective
- A1.2.9
- Level
- HL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper2
Typical marks4
Common command terms
- Explain
Recent exam appearances
November 2025Paper2 HL · TZ17(a)[ 4 ]A1.2.9—Diversity of DNA base sequences
Practice this objective
Coverage 2025–2025 · Updated 14 Jul 2026
Concept essentials
- Diversity of DNA base sequences should be described using precise molecular vocabulary.
- Structure and information must be kept separate: backbones provide continuity while bases carry sequence meaning.
- Exam answers should match the command term and avoid adding unsupported extra claims.