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DNA Structure and Replication

DNA Structure and Replication
A cesium chloride will separate DNA molecules by

resorption
absorption
adhesion
density

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DNA Structure and Replication
What is the only common methylation in the DNA of eukaryotes?

Cytosine in CpG dinucleotides
Guanosine in ApGpA trinucleotides
Adenosine in GpA dinucleotides
None of these

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

DNAb, DNA polymerase
DNAa, gyrase
DNAb, gyrase
Single stranded protein, DNAa

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DNA Structure and Replication
The melting of 40-45 bp at the oriC site of E. coli requires

DNA+ ATP + HU + DNAb + DNAa
DNA + ATP + HU + DNAb + DNAa + Pol III holoenzyme
DNA + ATP + HU
DNA + ATP + HU + DNAb

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DNA Structure and Replication
DNA helicase is used to

interact the double helix closely
break a phosphodiester bond in DNA strand
None of these
unwind the double helix

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DNA Structure and Replication
Which DNA polymerase removes RNA primers in DNA synthesis?

Polymerase II
Polymerase III
none of these
Polymerase I

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