Ribonucleic acid (RNA) is a linear molecule composed of four types of smaller molecules called ribonucleotide bases: adenine ... and a nitrogenous base. Adjacent ribose nucleotide bases are ...

Adenine plays a crucial role in maintaining the integrity of genetic information. Mutations can occur when adenine is altered or mismatched with other bases. For example ... It consists of an adenine ...

Laying the Groundwork: Levene Investigates the Structure of DNA ... and that each nucleotide was in turn composed of just one of four nitrogen-containing bases, a sugar molecule, and a phosphate ...

This image illustrates the chemical structure of a purine molecule, highlighting the numbering of the carbon and nitrogen ... Adenine and guanine, the two most common purines in DNA and RNA, share ...