The number of phosphorylations and dephosphorylations in PCR cycle respectively are 

PCR cycle is photosynthetic carbon reduction cycle  phosphorylations and dephosphorylations takes place during regeneration of calvin cycle .

Number of phosphorylations -3

( formation of fructose 1,6 bis phosphate , sedoheptulose 1,7 bis phosphate and ribulose 1,5 bis phosphate )

Number of dephosphorylations -2 ( formation of fructose 6 phosphate and formation of sedoheptulose 7 phosphate )