Nucleic acids

describe the structure of nucleotides, including the phosphorylated nucleotide ATP (structural formulae are not required)
describe the structure of RNA and DNA and explain the importance of base pairing and the different hydrogen bonding between bases (to include reference to adenine and guanine as purines and to cytosine, thymine and uracil as pyrimidines; to include also the recognition that purines have a double ring structure and pyrimidines have a single ring structure but structural formulae for bases are not required)