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DNA
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: [[DNA]] is made from four [[Nucleotide Base|nucleotide bases]] called [[Adenine]], [[Thymine]], [[Cytosine]], and [[Guanine]] referred to as A, T, C and G.
: The [[Nucleotide Base|nucleotide base]]s are arranged in complementary pairs. [[Adenine]] and [[Thymine]] pair up on opposite sides of the [[DNA]] strand. The same is true for [[Cytosine]] and [[Guanine]]. When the strand is pulled into two pieces this allows the [[DNA]] to make two exact copies of itself. So if one side of the strand has the code AAAACCCTTG then the other will have the code TTTTGGGAAC.
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Deoxyribonucleic acid (DNA), pages 174-175, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']