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DNA Structure and Replication

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

H-NS
HSP-1
All of these
HU

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DNA Structure and Replication
Which of the following is not a structural motif in DNA binding proteins?

zinc finger
TFIID
bZIP
helix-turn-helix

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DNA Structure and Replication
Which is the largest among the followings?

Carbon
Nitrogenous base
Phosphate
Nucleotide

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DNA Structure and Replication
DNA helicase is used to

break a phosphodiester bond in DNA strand
interact the double helix closely
unwind the double helix
None of these

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DNA Structure and Replication
DNA polymerases I also has

3'-5'exonuclease activity
5'-3' endonuclease activity
5'-3' exonuclease activity
both (a) and (b)

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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 time it takes the gel to run
the sedimentation coefficient

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