Which is the biological importance of the molecule adenosine triphosphate (atp)?

It helps to provide chemical energy.

Explanation:

ATP: Adenosine triphosphate is known as the molecules of nucleotides. They help to transfer, and store energy within the cell. ATP also helps to synthesis of nucleic acids.

By the hydrolysis of 3rd phosphate group present in the ATP molecule energy is released. After the release of phosphate group the resulting adenosine diphosphate can absorb the energy, and gain the group. This process allow ATP to store energy.