Answer:
A. gene structure changes ---> protein structure changes ----> protein function changes ----> observable trait changes
Explanation:
The gene structure changes before the protein structure, enabling it to building a new structure and therefore, the previous protein functions have a different function afterwards. Then, the observable traits will be affected and modified according to the new structure.
It can also be recharged by adding a third phosphate after the phosphate is removed creating ADP (adenosine diphosphate)
It is not easily recognizable
