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DNA Structure and Replication

DNA Structure and Replication
Which histone(s) are associated with the linker DNA of a nucleosome?

Histone H1
Histone H4
Histone H3
Histones H2A and H2B

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DNA Structure and Replication
During conventional transformation experiments E. coli cells and plasmid DNA interacts in an environment of

low temperature and Mg++
high temperature and Mg++
low temperature and Ca++
high temperature and Ca++

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

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

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

no activity
endonuclease activity
exonuclease activity
nickase activity

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DNA Structure and Replication
First evident that DNA is genetic material comes from the experiment of Griffith is

transduction
replication
translation
transformation

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

None of these
covalent bonds between the pair of bases
hydrogen bonds between the pair of bases
ionic bonds between the pair of bases

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