what are the enzymes involved in dna replication process?
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During DNA replication, one new strand (the leading strand) is made as a continuous piece. The other (the lagging strand) is made in small pieces. DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.
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The only role of DNA polymerase I is to hydrolyse the RNA primer and fill in the gaps with complementary deoxyribonucleoside triphosphates and the end of DNA replication. DNA polymerase III has 3 functions: Selects and adds free deoxyribonucleoside triphosphates complementary to the DNA template strand.
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DNA polymerase III holoenzyme is the enzyme primarily responsible for replicative DNA synthesis in E. coli. It carries out primer-initiated 5' to 3' polymerization of DNA on a single-stranded DNA template, as well as 3' to 5' exonucleolytic editing of mispaired nucleotides.
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DNA polymerase I functions to fill DNA gaps that arise during DNA replication, repair, and recombination. DNA polymerase II also functions in editing and proofreading mainly in the lagging strand (Kim et al. 1997, Wagner and Nohmi 2000). DNA polymerase III is the main replicative enzyme.
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DNA polymerase adds nucleotides to the three prime (3')-end of a DNA strand, one nucleotide at a time. Every time a cell divides, DNA polymerases are required to duplicate the cell's DNA, so that a copy of the original DNA molecule can be passed to each daughter cell.
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Just as helicase is responsible for unwinding the DNA strand, DNA polymerase is responsible for replicating the strand once it unwinds and separates. DNA is made up of a sugar-phosphate ladder and a nucleotide base. ... As there is more than one type of helicase, there is also more than one type of polymerase.
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The DNA polymerase is the enzyme that joins individual nucleotides to produce a new strand of DNA it produces the sugar phosphate bonds that join the nucleotides together and it proof reads each new DNA strand so that each copy is a near perfect copy of the original.
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helicase. ... DNA helicases also function in other cellular processes where double-stranded DNA must be separated, including DNA repair and transcription. RNA helicases are involved in shaping the form of RNA molecules, during all processes involving RNA, such as transcription, splicing, and translation.
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Both DNA replication and Transcription involve the generation of a new copy of the DNA in a cell. DNA transcription is involved in replicating the DNA into RNA, while the DNA replication makes another copy of DNA. Both the process is involved in the production of new nucleic acids- DNA or RNA.
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DNA replication is semiconservative. Each strand in the double helix acts as a template for synthesis of a new, complementary strand. New DNA is made by enzymes called DNA polymerases, which require a template and a primer (starter) and synthesize DNA in the 5' to 3' direction.
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DNA polymerase 3 is essential for the replication of the leading and the lagging strands whereas DNA polymerase 1 is essential for removing of the RNA primers from the fragments and replacing it with the required nucleotides. These enzymes cannot replace each other as both have different functions to be performed.
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['Viral replication involves six steps: attachment, penetration, uncoating, replication, assembly, and release.', 'During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it.']
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DNA replication is the action of DNA polymerases synthesizing a DNA strand complementary to the original template strand. ... In eukaryotes, the vast majority of DNA synthesis occurs during S phase of the cell cycle, and the entire genome must be unwound and duplicated to form two daughter copies.
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Deoxyribonucleic acid is the most basic molecule needed to form life. DNA needs help from enzymes in order to undergo the complicated and time-consuming replication process. Both helicase and DNA polymerase are involved in DNA replication, but the enzymes perform different functions within the replication process.
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The main function of DNA polymerase is to make DNA from nucleotides, the building blocks of DNA. There are several forms of DNA polymerase that play a role in DNA replication and they usually work in pairs to copy one molecule of double-stranded DNA into two new double stranded DNA molecules.
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Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
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There are four basic components required to initiate and propagate DNA synthesis. They are: substrates, template, primer and enzymes.