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DNA, genes and chromosomes
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DNA as stored information

DNA as stored information

Comparison of DNA organisation in a prokaryotic cell, eukaryotic nucleus, mitochondrion and chloroplast, with short circular DNA and long linear histone-associated DNA labelled DNA is a polymer made of nucleotides, and each nucleotide contains a phosphate, deoxyribose sugar and one base. Genetic information is carried in the base sequence of A, T, C and G.

DNA, genes and chromosomes Lesson

  1. A Level
  2. /Biology
  3. /DNA, genes and chromosomes

Step-by-step lessons on AQA A Level Biology DNA, genes and chromosomes. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons