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DNA Structure and Replication

DNA Structure and Replication
In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

purines
All of these
protamines
pyrimidines

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DNA Structure and Replication
During conventional transformation experiments E. coli cells and plasmid DNA interacts in an environment of

low temperature and Ca++
high temperature and Ca++
low temperature and Mg++
high temperature and Mg++

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DNA Structure and Replication
DNA with a G-C content of 50% will melt at approximately

60°C
100 °C
70 °C
90 °C

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

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

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DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

twisting number
linking number
none of these
helix frequency

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

Histone H3
Histones H2A and H2B
Histone H4
Histone H1

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