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DNA Structure and Replication

DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

halonoid
kinoplast
none of these
solenoid

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

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

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

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

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

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

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

B
S
None of these
H

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DNA Structure and Replication
The DNA is negatively super coiled, complexes to histone,

H-NS
All of these
HSP-1
HU

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