Biology (Combined Science) · GCSE · Edexcel · Edexcel GCSE Combined Science (1SC0) — Biology — Higher · Specification point · 3.4 · Genetics
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| Students should: | Maths skills |
|---|---|
3.4 Describe DNA as a polymer made up of: a two strands coiled to form a double helix b strands linked by a series of complementary base pairs joined together by weak hydrogen bonds c nucleotides that consist of a sugar and phosphate group with one of the four different bases attached to the sugar |