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DNA Replication

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semi conservative model

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Terms in this set (11)

semi conservative model

two daughter molecules will have one old strand derived from parent molecule and one newly made strand

origin of replication

replication of a DNA molecule begins at these sites

enzymes that untwist the double helix at the replication forks

single strand binding proteins

after parental strand seperates binds to unpaired DNA strands stabilizing

helps relieve this strain by breaking swiveling and rejoining DNA strand

catalyze the synthesis of new DNA by adding nucleotides to preexisting chain

dna polymerase III

using parental DNA as a template synthesize DNA strand by covalently adding nucleotides to the 3' end of a preexisting DNA or RNA primer

dna polymerase I

removes RNA nucleotide of primer from 5' end and replaces them with DNA nucleotides

DNA cutting enzyme -segment of strand containing damage is cut out

DNA polymerase and DNA ligase

enzymes that fill the gap when nuclease cuts out the damaged DNA

nucleotide excision repair

DNA repair system that use nuclease to cut out damaged strand and fills the gap with DNA polymerase and ligase