In this video, I explain ALL of the content required for the "Recombinant DNA Technology" section for AQA A Level Biology. This includes: creating DNA fragment by reverse transcriptases, restriction endonucleases + the gene machine, amplifying DNA fragments by PCR + transformation using plasmids, marker genes and gene therapy. Time stamps are in the comments.
I also go through a few exam questions and explain their mark schemes.

The content in this video crosses over with other exam boards too.

Please leave a comment if you have any questions, I'll be more than happy to answer them!!! :)