▁precisely , ▁a ▁process ▁term ed ▁DNA ▁rep lication . ▁Once ▁DNA ▁rep lication ▁has ▁finished , ▁in ▁e uk ary otes ▁the ▁DNA ▁mole c ule ▁is ▁compact ed ▁and ▁cond ensed , ▁to ▁form ▁the ▁mit otic ▁chrom os om es , ▁each ▁one ▁constit uted ▁by ▁two ▁sister ▁chrom at ids , ▁which ▁stay ▁held ▁together ▁by ▁the ▁establishment ▁of ▁coh es ion ▁between ▁them ; ▁each ▁chrom at id ▁is ▁a ▁complete ▁DNA ▁mole c ule , ▁attached ▁via ▁micro t ub ules ▁to ▁one ▁of ▁the ▁two ▁cent ros om es ▁of ▁the ▁div iding ▁cell , ▁located ▁at ▁opposed ▁pol es ▁of ▁the ▁cell . ▁To ▁avoid ▁prem ature ▁sister ▁chrom at id ▁separation , ▁the ▁A PC / C ▁is ▁maintained ▁in ▁an ▁in active ▁state ▁bound ▁to ▁different ▁mole cules , ▁which ▁are ▁part ▁of ▁a ▁complex ▁mechanism ▁term ed ▁the ▁sp ind le ▁assembly ▁check point . ▁ ▁Mechan ism ▁of ▁Sister ▁Ch rom at id ▁C oh es ion ▁ ▁It ▁is ▁not ▁clear ▁how ▁the ▁coh es in ▁ring ▁links ▁sister ▁chrom at ids ▁together . ▁There ▁are ▁two ▁possible ▁scenarios : ▁▁ ▁C oh es in ▁sub un its ▁bind ▁to ▁each ▁sister ▁chrom at id ▁and ▁form ▁a ▁bridge ▁between ▁the ▁two . ▁ ▁Since ▁coh es in ▁has ▁a ▁ring ▁structure , ▁it ▁is ▁able ▁to ▁enc irc le ▁both ▁sister ▁chrom at ids . ▁Current ▁evidence ▁suggests ▁that ▁the ▁second ▁scenario ▁is ▁the ▁most ▁likely . ▁Prote ins