Dna repair mechanism

1. Dr. M. PAVUNRAJ

21. MECHANISM:-

37. DNA methylation is a biological process by which methyl groups
are added to the DNA molecule. Methylation can change the activity
of a DNA segment without changing the sequence. When located in a
gene promoter, DNA methylation typically acts to repress gene
transcription. DNA methylation is one of the main epigenetic
modifications. It controls gene expression through
altering chromosomal structure, DNA conformation, DNA
stability and the function way between DNA and protein.
DNA METHYLATION
Epigenetics:the study of changes in organisms caused by modification of gene
expression rather than alteration of the genetic code itself.