During DNA replication, what is the role of the primase enzyme?Question 3Answera.The primase synthesizes short stretches of nucleic acids to bind the lagging strand and provide a starting point for DNA polymerase III activity.b.The primase binds to single stranded DNA to stablise them for DNA replication.c.The primase interacts with DNA polymerase III to terminate DNA replication.d.The primase facilitates unwinding of the DNA by breaking hydrogen bonds between the two strands.
Question
During DNA replication, what is the role of the primase enzyme?Question 3Answera.The primase synthesizes short stretches of nucleic acids to bind the lagging strand and provide a starting point for DNA polymerase III activity.b.The primase binds to single stranded DNA to stablise them for DNA replication.c.The primase interacts with DNA polymerase III to terminate DNA replication.d.The primase facilitates unwinding of the DNA by breaking hydrogen bonds between the two strands.
Solution
The role of the primase enzyme during DNA replication is to synthesize short stretches of RNA known as primers. These primers serve as a starting point for DNA synthesis. Here's a step-by-step breakdown:
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The process begins with the unwinding of the DNA double helix by the enzyme helicase. This creates two single-stranded DNA templates that are ready for replication.
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The enzyme primase then comes into play. It synthesizes a short RNA primer that is complementary to the DNA template. This primer provides a 3' end, which is necessary for the DNA polymerase to start adding nucleotides.
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Once the primer is in place, DNA polymerase III can start synthesizing the new DNA strand, using the original DNA strand as a template and the primer as a starting point.
So, the correct answer to your question would be: "The primase synthesizes short stretches of nucleic acids to bind the lagging strand and provide a starting point for DNA polymerase III activity."
Similar Questions
The following are enzymes required in DNA replication except A. DNA helicase B. Topoisomerase C. DNA primase D. DNA synthase
Match the enzymes to their role in the DNA replication process.RNA primaseligasehelicasepolymerasetopoisomeraseunwinds the DNA moleculesynthesizes the complementary daughter strandssynthesizes RNA primer at the initiation pointcreates nicks ahead of the replication fork to relieve tension from unwindingjoins the Okazaki fragments togetherReset Next
Which is true during DNA replication?Group of answer choicesDNA ligase is the last step of the polymerisation reaction for the lagging strand, but is not used on the leading strand.DnaA binds to regions that are rich in AT as this purine-purine base pairing forms only two hydrogen bonds.The β sliding clamp prevents the dissociation of DNA polymerase III, increasing the length of DNA each polymerase can synthesise.DNA gyrase binds to and applies tension to the lagging strand.
What is the main function of DNA helicase in DNA replication?Fusing DNA fragments togetherAdding complementary DNA bases to the newly forming DNA strandProofreading the DNA moleculeUnzipping the DNA double helix
Which DNA polymerase is involved in DNA replication?Group of answer choicesDNA polymerase I and DNA polymerase IIDNA polymerase I and DNA polymerase IIIDNA polymerase II and DNA polymerase IIIOnly DNA polymerase III
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