Identify the methylating agent used in biological systems.

Question

Quizplus · Accepted Answer

S-adenosylmethionine (SAM) is the methylating agent used in biological systems. SAM donates a methyl group to a variety of substrates including DNA, RNA, proteins, and lipids, through a process called methylation. Methylation plays a critical role in regulating gene expression, maintaining chromatin structure, and modulating protein function. Other options mentioned, such as methyl iodide, methyl bromide, methylalanine, and methylproline, are not commonly used as natural methylating agents in biological systems.

Identify the Methylating Agent Used in Biological Systems