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DNA Structure and Replication

DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

DNA topoisomerase
single stranded binding proteins
ligase
DNA helicases

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

About 100
Thousands and tens of thousands
none of these
One

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DNA Structure and Replication
The packing ratio of nucleosomes is about

9
7
8
6

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

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

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DNA Structure and Replication
An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called

reverse transcriptase
helicase
transposase
restriction endonuclease

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DNA Structure and Replication
A cesium chloride will separate DNA molecules by

adhesion
density
resorption
absorption

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