Question

_______ end-joining uses a newly-made sister chromatid as a template for perfect double-strand break repair

A) Homologous recombination
B) Non-homologous end-joining
C) Mismatch repair
D) Base excision repair

Answer 1

Non-homologous end-joining is the DNA repair mechanism that uses a newly-made sister chromatid as a template for perfect double-strand break repair.

Step-by-step explanation:

The correct answer is Non-homologous end-joining (NHEJ). NHEJ is a DNA repair pathway that rejoins the broken ends of DNA after a double-strand break. It does not require a template and can therefore result in the loss of nucleotides or the introduction of small insertions or deletions.