D1.3.10 (HL)—Conserved sequences
Conserved sequences remain similar across species because important functions can be maintained by purifying selection over evolutionary time in lineages.
- Syllabus
- First assessment 2025
- Objective
- D1.3.10
- Level
- HL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceNovember 2018
Most common paperPaper3
Typical marks1
Common command terms
- Identify
Recent exam appearances
November 2018Paper3 ["HL"] · TZ011(d)[ 1 ]D1.3.10 (HL)—Conserved sequences
Practice this objective
Coverage 2018–2018 · Updated 16 Jul 2026
Concept essentials
- Conserved sequences are similar across species or long evolutionary times.
- Alignment can reveal identical or highly similar sequence regions.
- Strong conservation often suggests functional importance.
- Purifying selection can maintain essential sequences by removing harmful changes.