austindominic58 austindominic58

08-09-2018
Biology

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describe the structure of DNA ? (6mrks) gcse edexcel 9-1

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karimmallickoukonv karimmallickoukonv

08-09-2018

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).

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