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DNA Structure and Replication

Q1:

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

A Adenosine in GpA dinucleotides

B Guanosine in ApGpA trinucleotides

C Cytosine in CpG dinucleotides

D None of the above

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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