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DNA Structure and Replication

DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

negative pole
none of these
will not migrate
positive pole

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

no activity
endonuclease activity
exonuclease activity
nickase activity

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DNA Structure and Replication
DNA gyrase in E. coli

adds positive supercoils to chromosomal DNA
can be inhibited with antibiotics
performs the same function as helicase in eukaryotes
is required only at the oriC site

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DNA Structure and Replication
Reverse transcriptase produces

RNA from DNA
RNA from RNA
DNA from peptides
DNA from RNA

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DNA Structure and Replication
A cesium chloride will separate DNA molecules by

absorption
adhesion
resorption
density

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DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

All of these
3' → 5' exonuclease
5' → 3' exonuclease
5' → 3' polymerase

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