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DNA Structure and Replication

DNA Structure and Replication
Which DNA polymerase removes RNA primers in DNA synthesis?

Polymerase I
Polymerase III
none of these
Polymerase II

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DNA Structure and Replication
DNA gyrase in E. coli

can be inhibited with antibiotics
is required only at the oriC site
adds positive supercoils to chromosomal DNA
performs the same function as helicase in eukaryotes

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DNA Structure and Replication
The melting of 40-45 bp at the oriC site of E. coli requires

DNA + ATP + HU
DNA+ ATP + HU + DNAb + DNAa
DNA + ATP + HU + DNAb
DNA + ATP + HU + DNAb + DNAa + Pol III holoenzyme

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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
hydrogen bonds between the pair of bases
None of these

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DNA Structure and Replication
The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by

None of these
using enzyme called telomerase
using RNA as a template
shortening of the double stranded replicated portion

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DNA Structure and Replication
Which will require a higher temperature to denature?

RNA with a high G-C content
DNA with a high G-C content
RNA with a high A-T content
DNA with a high A-T content

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