True about DNA methylation
DNA methylation is an epigenetic mechanism used by cells to control gene expression. A number of mechanisms exist to control gene expression in eukaryotes, but DNA methylation is a commonly used epigenetic signaling tool that can fix genes in the "off" position.Methylation epigenetically modifies the function of the DNA. When located in a gene promoter, DNA methylation typically acts to repress gene transcription.
Alters gene expression
Genetic code remains intact
Role in Carcinogenesis
Protective mechanism against cleavage by restriction endonuclease
Metabolism of nucleic acids