Unit 6 Gene Expression and Regulation AP BIO

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Last updated 5:57 PM on 4/14/26
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9 Terms

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Conservative Model

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Semi-Conservative Model

  • After generation 1 of DNA replication, both strands had N^15

  • After generation 2 of DNA replication, two strands have N^15

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Dispersive Model

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Helicase

  • Breaks apart double strands by breaking hydrogen bonds

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Topoisomerase

Relieves tension caused by unwinding

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Primase

  • Adds RNA primers to DNA strand

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DNA Polymerase III

  • Attaches DNA nucleotides

    • Moves in 3’ → 5’ direction

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DNA Polymerase I

  • Replaces RNA primer with DNA nucleotides

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DNA Ligase

  • Binds Okazaki fragments by catalyzing 3’C + Pi