Biology A-Level
heavy isotope labelling
What heavy isotope labelling means in Biology A-Level, as defined for AQA.
Definition of heavy isotope labelling
Check what you remember
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Reference: AQA
Growing bacteria in a medium with nitrogen-15, so all DNA bases contained it, before transferring cells to a medium with ordinary nitrogen-14.
Topics that use heavy isotope labelling
- DNA replication (AQA A-Level)
Related terms
- complementary base pairing
- density gradient centrifugation
- DNA polymerase
- genetic continuity
- Meselson and Stahl
- semi-conservative replication
- sister chromatids
- template strand
Using heavy isotope labelling in the exam
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