DNA Structure and Replication
What bands will be observed in a cesium chloride gradient after two rounds of replication?

One light, one medium and one heavy band
One light and one medium band
One medium and one heavy band
One medium band

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DNA Structure and Replication
In a typical electrophoresis experiment, larger fragments of DNA move more

quickly, so they appear nearer the bottom of a gel photograph
slowly, so they appear nearer the bottom of a gel photograph
quickly, so they appear nearer the top of a gel photograph
slowly, so they appear nearer the top of a gel photograph

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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

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

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