What is the definition of phosphorylation?
The addition of a phosphate group to an organic molecule.
Phosphorylation is important for many processes in living cells.
ATP is formed during cell respiration from ADP by phosphorylation,
as in the mitochondria of eukaryotic cells (oxidative
phosphorylation) and the chloroplasts of plant cells
(photosynthetic phosphorylation). Phosphorylation also regulates
the activity of proteins, such as enzymes, which are often
activated by the addition of a phosphate group and deactivated by
its removal (called dephosphorylation).
simplified for dummies like me : The addition of a phosphate
group to a molecule.
edited and simplified by Holy122 :P