試題詳解

25. What is the main difference between mismatch repair (MMR) in eukaryotes and prokaryotes?
(A) Eukaryotes lack a functional Mut H and Dam methylase.
(B) Eukaryotes have proteins homologous to MutS and MutH but not MutL.
(C) Eukaryotes only repair the lagging strand.
(D) Prokaryotic MMR can repair small loops of unpaired nucleotides, whereas eukaryotes cannot.
(E) Both use exonucleases to eliminate the mismatched strand but eukaryotes only require 3'-5' exonucleases.