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<p>organisms. The <a href="page.php?w=genome">genome</a> of an organism consists of complementary pairs of enormously long polynucleotides wound around each other in the form of a <a href="page.php?w=double_helix">double helix</a>. Polynucleotides have a variety of other roles in organisms.</p>

<p><big>Polynucleotides in scientific experiments</big></p>
<p>Polynucleotides are used in biochemical experiments such as <a href="page.php?w=polymerase_chain_reaction">polymerase chain reaction</a> (PCR)  or <a href="page.php?w=DNA_sequencing">DNA sequencing</a>.</p><p>
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