Answer:
The statement which is not true is d. used ATP is discarded by the cells as waste.
Step-by-step explanation:
ATP can be described as the energy molecule which is required by each cell of the body to carry out its normal function, for example like growth of a cell etc
When a phosphate atom attaches to ADP, ATP is produced. The bond present between the second and third phosphate group has a huge amount of energy in it. When this bond is broken, energy is released converting ATP back into ADP. The energy is used by the cells whereas ADP will get converted to ATP again for usage. Hence, option D is false.