In genomic imprinting. DNA is modified by:
(A) Acetylation (B) Methylation (C) Phosphorylation (D) Deamination
(B) Ans: B. Methylation(Ref Robbins 9/e p180, 8/e pl)Genomic imprinting:DNA modified by methylation.An epigenetic process resulting in differential inactivation of either maternal or paternal alleles of ceain genes.Mechanism:DNA methylation at CG nucleotide.Histone H4 deacetylation.Methylation.