ATP is a composed of a nitrogen-containing base, adenine, and a 5-carbon sugar ribose (together called adenosine), and three phosphate groups.

ATP is a nucleotide composed of a nitrogen-containing base, adenine, and a 5-carbon sugar ribose (together called adenosine), and three phosphate groups.

ATP, known as Adenosine triphosphate, is a biological molecule that stores and releases energy for use by living cells.

ATP stores energy in its chemical bonds and releases the energy when the bond is broken.

However, ATP is classified as a nucleotide because it is structurally made up of a nitrogenous base called adenine, a 5-carbon sugar called ribose, and three phosphate groups.

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Nucleotide

Explanation:

Nucleotides are molecules consisting of a nucleoside and a phosphate group. They are the basic building blocks of DNA and RNA.

A nucleotide consists of a nitrogenous base, a sugar (ribose or deoxyribose) and one to three phosphate groups.

In Adenosine Triphosphate (ATP), the nitrogenus basae is the adenine.