DNA Structure and Replication
In a cesium chloride gradient, DNA labeled with 15N and centrifuged will form a band

below DNA containing 14N
above DNA containing 14N
with 14N-containing DNA
all of these

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DNA Structure and Replication
Nucleosome is

an hexamer of three histones without H1 protein
an octamer of four histones with H1 protein
an hexamer of three histones with H1 protein
an octamer of four histones without H1 protein

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