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DNA Structure and Replication

DNA Structure and Replication
Messelsen and Stahl model of replication was called

conservative replication
semi-conservative replication
dispersive replication
Cri du Chat

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DNA Structure and Replication
What is the range of melting point temperatures (Tm) for most DNA molecules?

70 to 90°C
60 to 80°C
50 to 60°C
80 to l00°C

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DNA Structure and Replication
An important difference between eukaryotic and prokaryotic DNA replication is

multiple origins of replication in eukaryotes
RNA primers are not required in eukaryotes
more DNA polymerases are found in eukaryotes
eukaryotic DNA polymerases are faster

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DNA Structure and Replication
The chromosomal DNA complexes with

two types of histone as H1 and H4
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

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DNA Structure and Replication
What is the approximate percentage of repetitive DNA sequences in human DNA?

20 to 30%
10 to 20%
40 to 50%
30 to 40%

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

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

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