How Are Methylated Sites in DNA Maintained Through Multiple Cycles

How are methylated sites in DNA maintained through multiple cycles of DNA replication during development?

A) DNA polymerase incorporates a 5-methyl cytosine next to a G bound to an existing 5-methyl cytosine.
B) DNA polymerase adds a methyl group to a cytosine next to a G bound to an existing 5-methyl cytosine.
C) A methylating enzyme adds a methyl group to a cytosine next to a G bound to an existing 5-methyl cytosine.
D) A methylating enzyme adds a methyl group to a guanosine next to a C bound to an existing 5-methyl guanosine.

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