<P> ATP , the `` high - energy '' exchange medium in the cell , is synthesized in the mitochondrion by addition of a third phosphate group to ADP in a process referred to as oxidative phosphorylation . ATP is also synthesized by substrate - level phosphorylation during glycolysis . ATP is synthesized at the expense of solar energy by photophosphorylation in the chloroplasts of plant cells . </P>
<P> ATP , the `` high - energy '' exchange medium in the cell , is synthesized in the mitochondrion by addition of a third phosphate group to ADP in a process referred to as oxidative phosphorylation . ATP is also synthesized by substrate - level phosphorylation during glycolysis . ATP is synthesized at the expense of solar energy by photophosphorylation in the chloroplasts of plant cells . </P>
what adds a phosphate group to adp to form atp
what adds a phosphate group to adp to form atp
oxidative phosphorylation
oxidative phosphorylation