DNA replication enzymes Flashcards


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created 5 weeks ago by x_sh4dow
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ap biology
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1

Helicase

unzips the double helix

2

dna polymerase III

Adds complementary bases continuously from the 5'-3' direction

3

primase

places RNA primers/flags starting sequence to mark starting point of DNA polymerase

4

exonuclease

removes RNA primers afterwards

5

DNA polymerase I

adds complementary bases to the lagging strand

6

Topiosomerase

prevents supercoiling of the helix

7

telomerase

uses RNA to rebuild telomeres(repeating units of TTAGGG that protect the main DNA)

8

Okazaki fragments

-fragments of complementary dna and rna base pairs on the lagging strand

9

DNA ligase

covalantly bonds Okazaki fragments together