This video covers topic 1.5.2 of the AQA A LEVEL biology specification: DNA replication. It covers the nucleotide structure of DNA, the method of semi-conservative replication including the roles of enzymes DNA helicase and DNA polymerase. the video looks at the work of Watson and Crick in the discovery of the double helix structure of DNA, as well as the Meselson and Stahl experiment using nitrogen isotopes.
