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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

restriction endonuclease
reverse transcriptase
transposase
helicase

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DNA Structure and Replication
DNA polymerases I also has

5'-3' exonuclease activity
both (a) and (b)
3'-5'exonuclease activity
5'-3' endonuclease activity

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

Cri du Chat
conservative replication
semi-conservative replication
dispersive replication

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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
Thousands and tens of thousands
About 100

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DNA Structure and Replication
Proteins involved in opening a replication bubble are

single stranded binding proteins
DNA topoisomerase
DNA helicases
ligase

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DNA Structure and Replication
DNA helicase is used to

interact the double helix closely
unwind the double helix
break a phosphodiester bond in DNA strand
None of these

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