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Is the repair of damaged DNA best viewed as a race between an endonuclease and DNA ligase Helicase Methylase DNA polymerase or Primase?
It's not really a race at all as the processes cooperate with each other, but there are two possible analogies from your options.
The first, and the most applicable to living cells, is a race between polymerase and methylase. However, this is only the case in prokaryotes (bacteria etc) and not in eukaryotes (humans, animals, plants etc) because the latter don't methylate their DNA. The reason for this "race" is that the prokaryotic repair enzymes use hemi methylated sites (only methylated on one side) to identify which of the two bases in a mismatched base pair is incorrect (it will be the newest unmethylated one). If the methylase gets there before the repair enzymes do, then there will be no way to tell and repair is limited to homologous recombination, which can't always take place as it relies on a homologous chromosome (an exact copy) being present. But in a living cell, methylase always lags behind polymerase and the repair enzymes to avoid this happening.
The second possible "race" is between the endonuclease and the polymerase, since polymerase replicates DNA and endonuclease (in this case) repairs it. If the polymerase replicates DNA before damage repair, you get cell division with a permanent mutation in one cell, which is why they could be considered to "race". But realistically, if polymerase comes across any DNA damage, it will usually stop and wait for the repair to take place anyway, and actively recruits the necessary enzymes to do so.
What else can I help you with?
What enzymes are responsible for replication of the DNA molecule?
Helicase is the enzymes that splits the double helix into two separate strands, and DNA Polymerase (as opposed to RNA Polymerase) joins the nucleotides together in the new strands being created.
What are the three enzymes involved in DNA transcription?
The three enzymes involved in DNA transcription are RNA polymerase, helicase, and topoisomerase. RNA polymerase is responsible for synthesizing RNA from a DNA template, helicase unwinds the DNA double helix, and topoisomerase helps to relieve the tension that builds up ahead of the replication fork.
What gives dna polymerase a starting point?
The primase gives the dna polymerase a starting point.
What does DNA primase create?
DNA primase creates RNA primer. DNA primase is an enzyme and DNA polymerase uses the RNA primer to replicate ssDNA.
What are the special enzymes of DNA replication?
The main enzymes involved in DNA replication are: Helicase: unwinds the double helix into two strands Polymerase: adds nucleotides to an existing strand Ligase: brings together the Okazaki fragments Topoisomerase: cuts and rejoins the helix RNA primase: catalyzes the synthesis of RNA primers Hope this helps!
What are the four enzymes involved in DNA replication and repair?
The four enzymes involved in DNA replication and repair are DNA polymerase, DNA helicase, DNA ligase, and DNA primase. DNA polymerase synthesizes new DNA strands, DNA helicase unwinds the double helix, DNA ligase joins the Okazaki fragments on the lagging strand, and DNA primase synthesizes RNA primers for DNA polymerase to begin replication.
What enzymes are responsible for replication of the DNA molecule?
Helicase is the enzymes that splits the double helix into two separate strands, and DNA Polymerase (as opposed to RNA Polymerase) joins the nucleotides together in the new strands being created.
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 are the three enzymes involved in DNA transcription?
The three enzymes involved in DNA transcription are RNA polymerase, helicase, and topoisomerase. RNA polymerase is responsible for synthesizing RNA from a DNA template, helicase unwinds the DNA double helix, and topoisomerase helps to relieve the tension that builds up ahead of the replication fork.
Which enzyme synthesizes RNA primer?
primase bind to dna helicase. form a complex called primose.
Two major enzymes used during DNA replication?
Two major enzymes used during DNA replication are DNA polymerase, which synthesizes new DNA strands by adding nucleotides in a complementary manner, and DNA helicase, which unwinds the DNA double helix to expose the template strands for replication.
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) !!!!!
Which of the following enzymes creates a primer for DNA polymerase?
DNA primase is the enzyme that creates the RNA primer needed for DNA polymerase to initiate DNA synthesis.
What is replisome?
A replisome is a complex of proteins involved in DNA replication. It consists of multiple components, including DNA polymerase, helicase, primase, and other enzymes that work together to synthesize new DNA strands during replication. The replisome coordinates the unwinding of the double-stranded DNA, synthesis of new DNA strands, and proofreading functions to ensure accurate replication.
What gives dna polymerase a starting point?
The primase gives the dna polymerase a starting point.
What enzymes build DNA?
Enzymes involved in DNA replication include DNA polymerase, helicase, primase, ligase, and topoisomerase. These enzymes work together to unwind the DNA helix, synthesize new DNA strands, and repair any mistakes that may occur during the process.
What is the primase and its function?
Primase in the DNA-dependent RNA polymerase enzyme that functions in DNA replication by synthesizing the RNA primers which are then extended by DNA polymerase to yield newly synthesized DNA fragments. While being an RNA polymerase, primase is different from the RNA polymerase that functions in the transcription of DNA.
