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6.1.5 DNA structure
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DNA and nucleotides

DNA and nucleotides

DNA double helix, sugar-phosphate backbone and an enlarged nucleotide containing phosphate, sugar and a base

DNA is a polymer made from two long strands twisted into a double helix. It can be pictured as a twisted ladder, with the strands forming the sides and paired bases forming the rungs.

6.1.5 DNA structure Lesson

  1. GCSE
  2. /Biology
  3. /6.1.5 DNA structure

Step-by-step lessons on AQA GCSE Biology 6.1.5 DNA structure. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons