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DNA Structure and Replication

DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

no activity
endonuclease activity
nickase activity
exonuclease activity

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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
DNAs when charged, migrate in a gel towards the

positive pole
none of these
will not migrate
negative pole

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

none of these
linking number
helix frequency
twisting number

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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?

About 100
Thousands and tens of thousands
One
none of these

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

dispersive replication
conservative replication
semi-conservative replication
Cri du Chat

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