Final answer:
Homologous recombination in double strand break repair preserves the accuracy of DNA repair by using a template strand of homologous DNA. It requires various proteins and enzymes.
Step-by-step explanation:
Homologous recombination preserves the accuracy of DNA repair by using a template strand of homologous DNA to restore the original sequence. It requires several proteins and enzymes, such as MRX, MRN, Sae2, and Sgs1, which bind at the double-stranded break and recruit other factors to facilitate repair.