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helicases are necessary for unwinding double stranded DNA. in order to replicate its DNA, the cell must first unwind the two strands. once the the two strands have been separated enzymes such as DNA polymerase and RNA polymerase can act on the single stranded DNA.
DNA polymerase creates a strand of DNA from a template strand of DNA. it is used to create a new copy of the DNA. In order to begin DNA synthesis, a primer is necessary. The primer is a short oligo nucleotide fragment that hybridizes to the template strand of DNA (the strand which is to be copied). Once the primer is hybridized, the DNA polymerase can extend the primer and add nucelotides in a Watson-crick base pairing fashion. DNA polymerases always extend the primer in the 5' to 3' direction.
RNA polymerases are used to transcribe genes from DNA. Transcribtion is the process of making an RNA copy of information encoded in DNA. Once a gene is transcribed and a messenger RNA (mRNA) is produced, that mRNA can leave the nucleus to be translated into a protein by the ribosome. RNA polymerases work in a somewhat similar fashion to DNA polymerases, save for the fact that they produce RNA from DNA, instead of producing a new copy of the DNA.
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 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 enzyme joins pieces of DNA together?
Ligase is used to join DNA strands together
Which enzyme is responsible for creating the covalent bonds that connect the sugar phosphate back bone of the new DNA molecules?
An enzyme called HELICASE breaks the sugar to phosphate bonds in DNA strands to initiate DNA replication and DNA transcription.
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 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 are the two major enzymes used during DNA replcation?
DNA polymerase and Helicase (also ligase has come work)
What is the function of DNA ligase?
Ligase joins together the Okazaki fragments into a continuous strand of DNA.
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.
Which molecule is active during the last step during DNA replication?
DNA ligase. Apex
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 enzyme cuts and seals DNA?
The enzyme that cuts DNA is called a restriction enzyme, while the enzyme that seals DNA is called DNA ligase. Restriction enzymes cut DNA at specific sequences, creating breaks in the DNA strands, while DNA ligase seals these breaks by catalyzing the formation of phosphodiester bonds between the DNA fragments.
Does RNA polymerase require helicase for its function?
No, RNA polymerase does not require helicase for its function. RNA polymerase is responsible for synthesizing RNA from a DNA template, while helicase is an enzyme that unwinds the DNA double helix during processes like DNA replication and transcription.
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 is the function of the enzyme DNA ligase?
DNA ligase is an enzyme that plays a crucial role in the process of DNA replication and repair by joining together the ends of DNA strands to form a continuous strand.
