Biology A-Level
DNA helicase
What DNA helicase means in Biology A-Level, as defined for AQA.
Definition of DNA helicase
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Reference: AQA
Unwinds DNA and breaks the hydrogen bonds between complementary bases in the polynucleotide strands.
Topics that use DNA helicase
- DNA replication (AQA A-Level)
Related terms
- complementary base pairing
- density gradient centrifugation
- DNA polymerase
- genetic continuity
- heavy isotope labelling
- Meselson and Stahl
- semi-conservative replication
- sister chromatids
Using DNA helicase in the exam
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