Describe the structure of dna ? (6mrks) gcse edexcel 9-1

DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it

radon is correct hope this