Which of these is required for first strand invasion in the double-strand break repair model?
A) blunt end double strand break on two sister chromatids
B) 3' single strand tails on one sister chromatid
C) 3' single strand tails on both sister chromatids
D) 5' single strand tails on one sister chromatid
E) 5' single strand tails on both sister chromatids

Question

Quizplus · Accepted Answer

First strand invasion in the double-strand break repair model requires the presence of 3' single strand tails on one sister chromatid. These tails allow the formation of the D-loop structure, where the invading strand pairs with the complementary sequence on the broken strand.

Which of These Is Required for First Strand Invasion in the Double-Strand