Explain how a mutation in a nucleotide sequence of a gene can affect gene function

What is the problem in this article? what solution does the article propose?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things