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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?

Three
One
Two
A smear

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DNA Structure and Replication
An important difference between eukaryotic and prokaryotic DNA replication is

eukaryotic DNA polymerases are faster
more DNA polymerases are found in eukaryotes
multiple origins of replication in eukaryotes
RNA primers are not required in eukaryotes

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DNA Structure and Replication
What is the approximate size (in kb) of the E. coli genome?

3000 kilobase
4500 kilobase
6500 kilobase
5500 kilobase

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

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DNA Structure and Replication
One hypothesis of DNA replication suggested that the parental DNA molecules are broken into fragments. Both strands of DNA in each of the daughter molecules are made up of an assortment of parental and new DNA. This statement refers to which hypothesis?

Conservative theory
Evolutionary theory
Semi-conservative theory
Dispersive theory

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DNA Structure and Replication
The nicks or gaps between Okazaki fragments are eventually sealed by

RNA ligase
polymerase
gyrase
DNA ligase

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