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DNA Structure and Replication

DNA Structure and Replication
DNA can be sequenced by the

chemical method
chain termination procedure
both (a) and (b)
physical method

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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
all of these
above DNA containing 14N

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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
One
About 100

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DNA Structure and Replication
The size of a linear DNA fragment in a gel can be estimated by

fluorescence in UV light
comparison with a molecular weight standard such as Hind III digested phage lambda
the sedimentation coefficient
the time it takes the gel to run

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DNA Structure and Replication
Messelsen and Stahl model of replication was called

dispersive replication
conservative replication
semi-conservative replication
Cri du Chat

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DNA Structure and Replication
An RNA primer is synthesized by

DNA helicases
primase
DNA topoisomerase
ligase

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