What is the Molecular Mechanism for Imprinting a Gene

Question

What is the molecular mechanism for imprinting a gene?
A) Acetylation
B) Nitration
C) Phosphorylation
D) Methylation

Accepted Answer

Imprinting a gene involves the addition of a methyl group to the DNA molecule, which can affect the expression of the gene. This methylation can occur on the cytosine bases within the DNA sequence and is often associated with a particular parent-of-origin of the gene.