Question

Which answer correctly explains how the ATP molecule differs in function from the ADP molecule?

Answer 1

@Elawrence26
ADP is a product of ATP.
adenasediphosphate and adenasetriphosphate
as the name suggests diphosphate is only 2 phosphate and tri tphosphate is 3 phosphate. during the process of converting ATP to ADP one phosphate is lost.

Answer 2

I would like to add that ATP is when the molecule is ready to lose one phosphate. This is a catabolic reaction, which mean that releases energy. In conclusion, the function of ATP is providing energy to the metabolic processes (synthesis of polymers,...). The ADP is the result of loosing the phosphate and its functions is to wait for being recharge ADP+P=ATP (and again we have energy available).
I hope this helps you