From bottom to top will be the proper sequence. i.e. The E will be the oldest, followed by D—C—B—A.
One of structural elements, or components, of RNA and DNA is the nucleotide. A nucleotide is made up of a bases (one of the four substances adenine, thymine, purines, and cytosine), a sugar molecule, and a phosphoric acid molecule.
The building blocks of DNA and RNA are nucleotides. They have genetic material in them. As coenzymes, nucleotides are necessary for enzymes to catalyze various biological processes. In our bodies, energy is stored as ATP.
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