Schematic diagram of a double-stranded nucleic acid.<br><p>Green circle: pentose sugar<br>
Yellow-green circle: phosphate<br></p>
Red circle: nitrogenous base
<a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Krishnavedala</a>
<span class="int-own-work" lang="en">Own work</span>