Respuesta :
ADP is adinosine diphosphate and ATP is adinosine triphosphate. ADP has only two phosphate group and ATP has three Phosphate group. ATP is the energy rich compound which cell uses for its activities. When ATP is utilized it loose phosphate and form ADP
The structural difference:
ATP and ADP both have similar structures, except for the fact that ATP has three phosphates while ADP only has 2.
Functional difference:
ATP is the main energy carrier, and it's like the "currency" for any living organism. Once ATP is used, it becomes ADP because the extra phosphate is used up for the energy. ADP will become ATP again through the cellular respiration process.
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