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DNA Structure and Replication

DNA Structure and Replication
After one replication in 15N, how many bands should be observed in a cesium chloride gradient?

Two
One
A smear
Three

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

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

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DNA Structure and Replication
What is the IUPAC code for an A, C, T ambiguity in a nucleic acid sequence?

H
S
None of these
B

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DNA Structure and Replication
Which enzyme catalyzes the elongation of DNA molecules?

Helicase
DNA ligase
Primase
DNA polymerase

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

Thousands and tens of thousands
none of these
About 100
One

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DNA Structure and Replication
DNA replication results in

one new molecule of RNA
two completely new DNA molecules
one new DNA molecules 1 old molecule
two DNA molecules such that each one contains a strand of the original

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