IB Biology HL 1.1.3 Replication enzymes and strand synthesis Question Bank
Practise IB Biology HL 1.1.3 by analysing the coordinated roles of replication enzymes and strand synthesis.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Compare helicase, gyrase and DNA polymerase roles at a replication fork.
- Analyse how enzyme action, template direction and nucleotide addition maintain accurate synthesis.
- Evaluate an enzyme description by checking the bonds broken, formed and the strand affected.
D1.1.3—Role of helicase and DNA polymerase question 1
[Maximum number: 1]
Explain the role of the following enzymes in DNA replication.
Explain the role of helicase in DNA replication.
helicase: unwinds /unzips the DNA (into two strands) / breaks H bonds;
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