D1.1 DNA replication

DNA replication copies genetic information through template strands, complementary pairing, enzyme action, proofreading, and laboratory amplification or separation techniques used to analyse DNA.

What you’ll learn

9 learning objectives

Choose one objective for a focused lesson, or study the complete topic.

Exam analysis

An aggregate view of how the complete D1.1 DNA replication appears across past papers.

Chance of appearing30%of analysed past papers

Latest appearanceNovember 2025

Most common paperPaper1

Most tested objectives

D1.1.4—PCR and gel electrophoresis16 questions
D1.1.8 (HL)—Functions in replication14 questions
D1.1.5—Applications6 questions

Common question formats

Definition or recall
Diagram interpretation
Structured response
Process explanation
Calculation
Data analysis
Comparison

Exam question appearances

November 2025Paper2 ["HL"] · TZ19(a)[ 4 ]D1.1.9 (HL)—DNA proofreading

November 2025Paper1A ["HL"] · TZ19[ 1 ]D1.1.4—PCR and gel electrophoresis

November 2025Paper1A ["HL"] · TZ310[ 1 ]D1.1.4—PCR and gel electrophoresis

May 2025Paper1A ["HL"] · TZ19[ 1 ]D1.1.9 (HL)—DNA proofreading

November 2024Paper1 ["HL"] · TZ026[ 1 ]D1.1.7 (HL)—Leading vs. lagging strand

Practice this topic

4 original exam-style questions based on the patterns above.

Coverage 2013–2025 · Updated 16 Jul 2026