DNA Structure and Replication
An important difference between eukaryotic and prokaryotic DNA replication is

multiple origins of replication in eukaryotes
more DNA polymerases are found in eukaryotes
eukaryotic DNA polymerases are faster
RNA primers are not required in eukaryotes

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DNA Structure and Replication
Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that

only one chromatid of a chromosome was labeled
both (a) and (b)
neither chromatid was labeled
both chromatids of a chromosome were labeled

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