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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

All of these
pyrimidines
purines
protamines

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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?

none of these
One
About 100
Thousands and tens of thousands

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DNA Structure and Replication
Enzymes, responsible for unraveling short segments of DNA is

DNA polymerase
helicase
primase
DNA ligase

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

linking number
helix frequency
twisting number
none of these

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DNA Structure and Replication
An RNA primer is synthesized by

DNA helicases
ligase
primase
DNA topoisomerase

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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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