D1.1.1—DNA replication
DNA replication explains how DNA is copied, checked, amplified or analysed through specific strand relationships, enzyme functions and molecular techniques.
- Syllabus
- First assessment 2025
- Objective
- D1.1.1
- Level
- SL
Exam analysis
Chance of appearing2%of analysed past papers
Latest appearanceNovember 2015
Most common paperPaper1
Typical marks1–3
Common command terms
- Identify
- Explain
Scoring notes
- Common mistake
- Saying both parental strands stay together instead of one parental strand entering each daughter molecule.
Recent exam appearances
November 2015Paper1 ["SL"] · TZ09[ 1 ]D1.1.1—DNA replication
November 2013Paper2 ["SL"] · TZ03(b)[ 3 ]D1.1.1—DNA replication
May 2012Paper1 ["SL"] · TZ19[ 1 ]D1.1.1—DNA replication
Practice this objective
Coverage 2012–2015 · Updated 16 Jul 2026
Concept essentials
- DNA replication depends on matching each strand, enzyme or laboratory step to its exact function.
- Template strands and complementary base pairing give dna replication its copying accuracy.
- DNA replication is clearer when amplification, separation and profiling are not confused.
- Molecular evidence for dna replication must be interpreted from bands, isotopes, primers or enzyme roles.