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DNA Structure and Replication

DNA Structure and Replication
Which histone(s) are associated with the linker DNA of a nucleosome?

Histones H2A and H2B
Histone H3
Histone H4
Histone H1

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DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

strandase
none of these
DNA polymerase
helicase

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

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DNA Structure and Replication
TM refers to the temperature at which

50% of a protein molecules are denatured
All of these
50% of a DNA molecule is denatured
membranes are 50% fluid

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DNA Structure and Replication
The nicks or gaps between Okazaki fragments are eventually sealed by

polymerase
RNA ligase
gyrase
DNA ligase

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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

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

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