Which of the following mechanisms allow repair enzymes to distinguish incorrect bases in DNA?
A) The newly synthesized strand of DNA lacks methylated bases and other modifications.
B) Deamination of A and C lead to improper bases for DNA.
C) Thymine dimers and other cross links kink the DNA and are easy to find.
D) All of these mechanisms allow repair enzymes to distinguish which base is incorrect.

Question

Quizplus · Accepted Answer

All the mechanisms listed contribute to the ability of repair enzymes to identify and correct errors in DNA. Methylation patterns help distinguish the parent strand from the newly synthesized one, allowing for mismatch repair. Deamination changes the structure of bases, making them recognizable as errors. Thymine dimers and similar lesions distort the DNA helix, signaling for repair.

Which of the Following Mechanisms Allow Repair Enzymes to Distinguish