Double-stranded DNA consists of two polynucleotides that are arranged such that the nitrogenous bases within one polynucleotide ... were pursuing a definitive model for the stable structure ...

In the case of DNA and RNA, these monomers are nucleotides. Nucleotides themselves are composed of three distinct parts: sugar, phosphate, and a nitrogenous base. Here's what each of those really ...

How can just four nitrogenous bases--adenine ... is caused by either the addition or the deletion of a base in the original DNA sequence, which in turn causes the protein-forming machinery ...

Beginning with the body and ending with the atoms that make up a single DNA base, you'll be able to zoom in to 15 different levels to see DNA's relationship to us as a whole. Along the way you'll ...