Methyl directed Mismatch Repair
Ans: B. RNA Splicing
DNA methylation alters the gene expression pattern in the cells-for example it may cause X-chromosome inactivation, tumor suppressor gene silencing (in cancer cells), suppression of expression of repetitive elements / deleterious elements / viral genes that have been incorporated into the genome of the host over time.
Methylation is most common in CpG islands (a C G rich region, upstream of the promoter region and P signifies phosphodiester bond between them) producing methyl -CpG symmetrically on both strands of DNA.
DNA methylation of adenine at 5′ GATC repair mismatched base pairs. And methylated parental (template) strand is protected from cleavage/digestion by its restriction enzyme