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DNA Structure and Replication

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

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

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DNA Structure and Replication
Each replication bubbles consists of

1 replication forks
2 replication forks
3 replication forks
4 replication forks

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DNA Structure and Replication
The DNA polymerase in bacteria, responsible for DNA synthesis is

Polymerase I
Polymerase II
all of these
Polymerase III

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DNA Structure and Replication
What is the range of melting point temperatures (Tm) for most DNA molecules?

80 to l00°C
50 to 60°C
70 to 90°C
60 to 80°C

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DNA Structure and Replication
In DNA double helix, the two DNA chains are held together by

covalent bonds between the pair of bases
ionic bonds between the pair of bases
None of these
hydrogen bonds between the pair of bases

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

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

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