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Unformatted text preview: a. The origins of replication occur only at the 5 end. b. Helicases and single-strand binding protein work at the 5 end. c. DNA polymerase can join new nucleotides only to the 3 end of a growing strand d. DNA ligase works only in the 3 5 direction e. Polymerase can work on only one strand at a time....
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- Spring '08