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DNA Structure and Replication

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

reverse transcriptase
restriction endonuclease
helicase
transposase

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DNA Structure and Replication
The chromosomal DNA complexes with

three types of histone as H1, H2A and H4
five types of histone as H1, H2A, H2B, H3 and H4
four types of histone as H1, H2A, H3 and H4
two types of histone as H1 and H4

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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
solenoid
kinoplast
halonoid

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DNA Structure and Replication
The size of a linear DNA fragment in a gel can be estimated by

comparison with a molecular weight standard such as Hind III digested phage lambda
the sedimentation coefficient
the time it takes the gel to run
fluorescence in UV light

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DNA Structure and Replication
DNA replication in eukaryotes occurs only in

G2 phase
S phase
M phase
G1 phase

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

Histone H1
Histone H4
Histones H2A and H2B
Histone H3

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