DNA Structure and Replication

Q1: What is the only common methylation in the DNA of eukaryotes?

A None of the above

B Adenosine in GpA dinucleotides

C Guanosine in ApGpA trinucleotides

D Cytosine in CpG dinucleotides

ANS:C - Cytosine in CpG dinucleotides

DNA methylation is a biological process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence.

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