This lesson looks at the structure of the DNA that is found in the nucleus, mitochondria and chloroplasts of eukaryotic cells and in prokaryotic cells. Both the engaging PowerPoint and accompanying resources have been designed to cover point 2.1.3 (d)(i) of the OCR A-level Biology A specification.
As students will already have some knowledge of this nucleic acid from GCSE and from the earlier A-level topics, the lesson has been written to build on this prior knowledge and then to add key detail. As well as focusing on the differences between the DNA found in these two types of cells which includes the length, shape and association with histones, the various tasks will ensure that students are confident to describe how this double-stranded polynucleotide is held together by hydrogen and phosphodiester bonds. This knowledge of phosphodiester bonds means that specification point 2.1.3 © is also covered during this lesson. These tasks include exam-style questions which challenge the application of knowledge as well as a few quiz competitions to maintain engagement.
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