Revise GCSE Biology by listening to these podcasts from ... It has to be this way because that gives DNA its structure, ... made of 4 monomers called nucleotide bases: A, T G, and C. DNA is ...

The structure of a large nucleic acid complex formed by the 10–23 DNA enzyme bound to an RNA substrate was determined by X–ray diffraction at 3.0 Å resolution. The 82–nucleotide complex ...