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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
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?

Semi-conservative theory
Evolutionary theory
Conservative theory
Dispersive theory

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DNA Structure and Replication
The nucleosome consists of histone

None of these
tetramer and 146 bp of DNA
hexamer and 146 bp of DNA
octamer and 146 bp of DNA

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DNA Structure and Replication
The role of primase is to

cleave and unwinds short sections of DNA ahead of the replication fork
synthesize an RNA primer to begin the elongation process
proofread base pairing
dismantle RNA primer

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

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

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DNA Structure and Replication
If one cell has AT contents 40%, what will be the percentage of Guanine residue?

30%
15%
60%
Guanine residue can not be calculated

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