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DNA Structure and Replication

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

absorption
density
resorption
adhesion

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DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

none of these
kinoplast
solenoid
halonoid

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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?

One
Thousands and tens of thousands
none of these
About 100

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DNA Structure and Replication
DNA polymerases I also has

5'-3' exonuclease activity
5'-3' endonuclease activity
3'-5'exonuclease activity
both (a) and (b)

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DNA Structure and Replication
Which enzyme catalyzes the elongation of DNA molecules?

Helicase
Primase
DNA ligase
DNA polymerase

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

restriction endonuclease
transposase
reverse transcriptase
helicase

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