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DNA Structure and Replication

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

helicase
none of these
strandase
DNA polymerase

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DNA Structure and Replication
The packing ratio of nucleosomes is about

9
8
6
7

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DNA Structure and Replication
Proteins involved in opening a replication bubble are

single stranded binding proteins
ligase
DNA topoisomerase
DNA helicases

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

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DNA Structure and Replication
What does ligase do during replication of DNA?

Synthesizes the lagging strand
Joins nicks in DNA strands
Makes copies of mRNA from DNA
Digests mRNA when it is no longer needed

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

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