19. What is phosphorylation?
What are some biological
processes in which
phosphorylation plays a
critical role?

Gap-fill exercise

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is the name given to
processes of the addition of phosphates
to some molecules thus making these
molecules more .

Phosphorylation has an important role,
for example, in (the
photophosphorylation of the light phase)
and in respiration (oxidative
phosphorylation of the respiratory
chain). In general the phosphate used in
phosphorylation comes from
molecules.