The average number of nucleotides added before a polymerase dissociates defines its processivity. Nucleotides added per unit time dissociates defines its polymerisation
The 3’->5’ exonuclease activity removes the mispaired nucleotide, and the polymerase begins again known as proofreading
#Unit 3. Fundamental Processes#Mechanism of DNA synthesis in Prokaryotes#Part B Pointers