DNA and RNA are composed of nucleotides that ... These bonds are called phosphodiester bonds, and the sugar-phosphate backbone is described as extending, or growing, in the 5' to 3' direction ...

TComparison of a single-stranded RNA and a double-stranded DNA with their corresponding nucleobases (Image: Wikimedia Commons, CC SA 3.0) The nucleotides are connected through phosphodiester bonds, ...

Ribonucleic acid (RNA) is a linear molecule composed of four types of smaller molecules called ribonucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U). RNA is often compared ...