DNA Structure and Replication
What is the only common methylation in the DNA of eukaryotes?

None of these
Adenosine in GpA dinucleotides
Guanosine in ApGpA trinucleotides
Cytosine in CpG dinucleotides

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DNA Structure and Replication
In DNA, there are

four bases known as adenine, guanine, thymine and cytosine
three bases known as adenine, guanine and cytosine
five bases known as adenine, guanine, thymine, tryptophan and cytosine
only two bases known as adenine and cytosine

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