Which of the following statements about DNA methylation is TRUE?
(I)Methylation plays a role in genomic imprinting.
(II)Methylation can influence gene regulation.
(III)Methylation plays a role in restriction modification systems.
(IV)Methylation occurs in prokaryotic cells,but not eukaryotic cells.

Question

Quizplus · Accepted Answer

Statement (I) is true as methylation is involved in genomic imprinting, which is the process by which certain genes are expressed in a parent-of-origin-specific manner. Statement (II) is true as DNA methylation can affect gene expression by blocking the binding of transcription factors to DNA or recruiting proteins that repress gene expression. Statement (III) is true as methylation is a component of restriction modification systems, which protect bacterial cells from foreign DNA. Statement (IV) is false as methylation occurs in both prokaryotic and eukaryotic cells. Therefore, the correct choice is B, as it includes all the true statements.

Which of the Following Statements About DNA Methylation Is TRUE