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Helicase unwind the two DNA strands while topoisomerase unwind and also rejoin the the two strands of DNA.
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∙ 11y ago
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What enzyme cuts and seals DNA?
HaeIIIrestriction enzymes
What enzyme catalyzes DNA replication?
one of them is heliocase. it 'unzips' the DNA strand. You can always remember this because it's in a popular joke: Q. Why is the enzyme heliocase a lot like a teenage boy? A. They both want to unzip your jeans (genes) !!!!!
What are the 4 enzymes in DNA replication?
DNA Helicase - responsible for separating the two stands DNA Polymerase - responsible for catalyzing the addition of bases to the new strand DNA Ligase - responsible for sealing fragments
What enzyme can remove or insert super coil twists into circular DNA?
The enzyme topoisomerase is used in inserting or loosing supercoiling in DNA during replication. It is of different type like gyrase, helicase etc. and are found in prokaryotes and eukaryotes respectively
What enzyme is responsible for unwinding the DNA molecule for replication?
DNA Helicase is the enzyme responsible for unzipping DNA before replication occurs.
What enzyme is responsible for breaking the hydrogen bonds between the two strands and unwinding the helix?
Helicases and gyrases both function to uncoil the supercoiling of the two DNA strands. Moreover, gyrase is responsible for adjusting the tension in the two strands so that they don't snap while unraveling.
What enzyme cuts and seals DNA?
HaeIIIrestriction enzymes
What enzyme catalyzes DNA replication?
one of them is heliocase. it 'unzips' the DNA strand. You can always remember this because it's in a popular joke: Q. Why is the enzyme heliocase a lot like a teenage boy? A. They both want to unzip your jeans (genes) !!!!!
Is DNA helicase an enzyme?
Yes, it unwinds the DNA double helix prior to transcription/protein synthesis and DNA replication.
A researcher while working in vitro outside cell added helicase enzyme which resulted in the untwisting of the DNA helix But this untwisting led to strain ahead of the replication fork Which enzym?
Topoisomerase
What are the 4 enzymes in DNA replication?
DNA Helicase - responsible for separating the two stands DNA Polymerase - responsible for catalyzing the addition of bases to the new strand DNA Ligase - responsible for sealing fragments
What enzyme can remove or insert super coil twists into circular DNA?
The enzyme topoisomerase is used in inserting or loosing supercoiling in DNA during replication. It is of different type like gyrase, helicase etc. and are found in prokaryotes and eukaryotes respectively
What prevents hydrogen bonds between bases?
Helicase
Where does Helicase attach to on the DNA strand?
Enzyme helicase unwinds the DNA by breaking the bonds between nucleotides. Thus attaches itself at the nucleotides.
What enzyme is responsible for unwinding the DNA molecule for replication?
DNA Helicase is the enzyme responsible for unzipping DNA before replication occurs.
What is the difference between the helicase enzyme and DNA polymerase enzyme?
Helicase splits the 3' and 5' Okazaki fragments, while the DNA polymerase attaches the "new" 3' nucleotide, with the "old" 5' nucleotide. As well as proofreading, or making sure that the bases are complementary in order to avoid mutations.
How is a DNA molecule unzipped?
DNA is, as you say, "unzipped" is a complex process. DNA usually unwinds either to replicate DNA or synthesize mRNA to make proteins. I'll use DNA replication as the example. when the process starts, it will start at hundreds of sites along the length of the DNA molecule. once started the replication will proceed in both directions. DNA helicase is the enzyme that opens the two strands, and the enzyme topoisomerase is before helicase to make sure no tension builds up as the strands unwind. after topoisomerase runs down the length, closely followed by helicase, binding proteins stick to the newly opened nucleotides to prevent the strands from sticking together. that's the first basic step of DNA replication and basically answers your question. Helicase opens it, but remember it must be triggered by a enzyme of protein in order for it to start, and then continues until the molecule is finished.
