<Table> <Tr> <Th> Enzyme </Th> <Th> Function in DNA replication </Th> </Tr> <Tr> <Td> DNA Helicase </Td> <Td> Also known as helix destabilizing enzyme . Helicase separates the two strands of DNA at the Replication Fork behind the topoisomerase . </Td> </Tr> <Tr> <Td> DNA Polymerase </Td> <Td> The enzyme responsible for catalyzing the addition of nucleotide substrates to DNA in the 5 ' to 3 ' direction during DNA replication . Also performs proof - reading and error correction . There exist many different types of DNA Polymerase , each of which perform different functions in different types of cells . </Td> </Tr> <Tr> <Td> DNA clamp </Td> <Td> A protein which prevents elongating DNA polymerases from dissociating from the DNA parent strand . </Td> </Tr> <Tr> <Td> Single - Strand Binding ( SSB ) Proteins </Td> <Td> Bind to ssDNA and prevent the DNA double helix from re-annealing after DNA helicase unwinds it , thus maintaining the strand separation , and facilitating the synthesis of the nascent strand . </Td> </Tr> <Tr> <Td> Topoisomerase </Td> <Td> Relaxes the DNA from its super-coiled nature . </Td> </Tr> <Tr> <Td> DNA Gyrase </Td> <Td> Relieves strain of unwinding by DNA helicase ; this is a specific type of topoisomerase </Td> </Tr> <Tr> <Td> DNA Ligase </Td> <Td> Re-anneals the semi-conservative strands and joins Okazaki Fragments of the lagging strand . </Td> </Tr> <Tr> <Td> Primase </Td> <Td> Provides a starting point of RNA ( or DNA ) for DNA polymerase to begin synthesis of the new DNA strand . </Td> </Tr> <Tr> <Td> Telomerase </Td> <Td> Lengthens telomeric DNA by adding repetitive nucleotide sequences to the ends of eukaryotic chromosomes . This allows germ cells and stem cells to avoid the Hayflick limit on cell division . </Td> </Tr> </Table>
<Table> <Tr> <Th> Enzyme </Th> <Th> Function in DNA replication </Th> </Tr> <Tr> <Td> DNA Helicase </Td> <Td> Also known as helix destabilizing enzyme . Helicase separates the two strands of DNA at the Replication Fork behind the topoisomerase . </Td> </Tr> <Tr> <Td> DNA Polymerase </Td> <Td> The enzyme responsible for catalyzing the addition of nucleotide substrates to DNA in the 5 ' to 3 ' direction during DNA replication . Also performs proof - reading and error correction . There exist many different types of DNA Polymerase , each of which perform different functions in different types of cells . </Td> </Tr> <Tr> <Td> DNA clamp </Td> <Td> A protein which prevents elongating DNA polymerases from dissociating from the DNA parent strand . </Td> </Tr> <Tr> <Td> Single - Strand Binding ( SSB ) Proteins </Td> <Td> Bind to ssDNA and prevent the DNA double helix from re-annealing after DNA helicase unwinds it , thus maintaining the strand separation , and facilitating the synthesis of the nascent strand . </Td> </Tr> <Tr> <Td> Topoisomerase </Td> <Td> Relaxes the DNA from its super-coiled nature . </Td> </Tr> <Tr> <Td> DNA Gyrase </Td> <Td> Relieves strain of unwinding by DNA helicase ; this is a specific type of topoisomerase </Td> </Tr> <Tr> <Td> DNA Ligase </Td> <Td> Re-anneals the semi-conservative strands and joins Okazaki Fragments of the lagging strand . </Td> </Tr> <Tr> <Td> Primase </Td> <Td> Provides a starting point of RNA ( or DNA ) for DNA polymerase to begin synthesis of the new DNA strand . </Td> </Tr> <Tr> <Td> Telomerase </Td> <Td> Lengthens telomeric DNA by adding repetitive nucleotide sequences to the ends of eukaryotic chromosomes . This allows germ cells and stem cells to avoid the Hayflick limit on cell division . </Td> </Tr> </Table>
where does dna synthesis begin on a chromosome
where does dna synthesis begin on a chromosome
Primase
Primase