Biology · IGCSE · Edexcel · Pearson Edexcel International GCSE (9–1) Biology (Modular) — 4XBI1 · Specification point · 4.16B · Reproduction and inheritance · Inheritance
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4.16B describe a DNA molecule as two strands coiled to form a double helix, the strands being linked by a series of paired bases: adenine (A) with thymine (T), and cytosine (C) with guanine (G) |