How does DNA methylation affect E. coli? Selective self-methylation allows the identification and destruction of foreign DNA. Methylating agents are used as antibacterials to introduce irreparable DNA damage. Methylating foreign DNA allows the defense system to offensively target and destroy it. The synthesis of thymine depends on the methylation of cytosine.
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Which statement describes a function of the addition of methyl groups to DNA? A. Methylation is used by E. coli as part of a defense mechanism to distinguish its DNA from foreign DNA. B. Methylation serves as a marker during repair of DNA during replication. C. Methylation of DNA occurs in some animals when infected with certain bacteriophages. D. All of the statements describe a function of DNA methylation. E. None of the statements describes a function of DNA methylation.
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How is DNA methylation different between prokaryotes and eukaryotes? Why is DNA methylated?
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What is the role of DNA methylation in eukaryotes? To protect the DNA from restriction endonucleases To prevent nucleosome formation on that region of DNA To distinguish the active X chromosome from the inactive X chromosome in counting To aid in silencing transcription DNA methylation does not occur in eukaryotes, only histones are methylated.
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