and a nitrogenous base. Adjacent ribose nucleotide bases are chemically attached to one another in a chain via chemical bonds called phosphodiester bonds. Unlike DNA, RNA is usually single-stranded.

DNA is fundamental to the biology of all life on Earth, but how many of us actually know what it is or what it's made of?

Kossel isolated cytosine from calf thymus tissues and found that it was a component of nucleic acids. This discovery, along with the identification of other nitrogenous bases, laid the foundation for ...

RNA, or ribonucleic acid, is a essential biological molecule that plays a crucial role in various cellular processes. It is a polymeric molecule composed of nucleotides, each containing a ribose sugar ...

How can just four nitrogenous bases--adenine, cytosine ... and Us that could encode all 20 amino acids in RNA would be a triplet (three-base) code. A triplet combination, or codon, would allow ...