MICROANATOMY

Detailed explanation-1: -Adenosine triphosphate (ATP) is the source of energy for use and storage at the cellular level. The structure of ATP is a nucleoside triphosphate, consisting of a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate groups.

Detailed explanation-2: -Instead, cells use two highly-related compounds: adenosine triphosphate (ATP) and adenosine diphosphate (ADP). These two molecules are almost identical. Both are composed of one adenine molecule, a sugar molecule, and phosphate groups. As the names suggest, ATP has three phosphate groups and ADP has two.

Detailed explanation-3: -ATP is called the energy currency of the cell because it is the molecule that all living organisms use for energy. Cells need energy to power the various chemical reactions that are going on continuously, and they use ATP to store and then produce the energy for these reactions.