The structural difference between ATP and ADP - ADP has two phosphates while ATP has three.
ATP
- are composed of a ribose sugar, adenosine, and phosphate molecule.
- ATP consists of three phosphate molecules
- removal of the terminal (third) phosphate of ATP becomes ADP and a huge amount of energy released
ADP
- composed of a ribose sugar, adenosine, and phosphate molecule as well
- ADP molecule consists of two phosphate molecules.
- removal of the terminal (third) phosphate of ADP becomes AMP and a less amount of energy released
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