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DNA Structure and Replication

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

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

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DNA Structure and Replication
Which of the following species lack a 'classical' histone H1?

Strongylocentrotus purpuratus
Arabidopsis thaliana
Saccharomyces cerevisiae
Xenopus laevis

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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
result in Okazaki fragments on leading strand
are removed by Pol I

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DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

twisting number
helix frequency
linking number
none of these

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

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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

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

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