Mismatch repair systems that maintain DNA replication fidelity: Require a protein that detects the damaged base as well as a protein that excises the base from the strand. Rely on DNA glycosylase for proper function. Require a protein that detects the mismatch as well as a protein that recruits an endonuclease to the site of the mismatch. Are responsible for repairing C T point mutations. None of the above

The DNA can undergo the process process of mutation during the DNA replication process. The DNA repair process occurs in the body to repair the mismatched DNA.

The mismatch repair system identifies the insertion, deletion and mismatch DNA that can be corrected by mismatch repair system. The Mut S protein is required for the detection of mismatch DNA and mut H then acts as endonuclease to cut the protein and then DNA polymerase fills the gap.

Thus, the correct answer is option (1).