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DNA Structure and Replication

DNA Structure and Replication
What is the approximate percentage of repetitive DNA sequences in human DNA?

40 to 50%
30 to 40%
20 to 30%
10 to 20%

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

All of these
HU
HSP-1
H-NS

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

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

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DNA Structure and Replication
The RNA primers used to initiate replication in E. coli

are joined together by DNA ligase
are removed by helicase + ATP
are removed by Pol I
result in Okazaki fragments on leading strand

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DNA Structure and Replication
How does ethidium bromide interact with DNA?

It intercalates between bases
It binds to adenine
It binds to phosphate
It does not interact

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DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

5' → 3' exonuclease
3' → 5' exonuclease
5' → 3' polymerase
All of these

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