What enzyme unzips and unwinds?
helicase
DNA replication begins when an enzyme called helicase unwinds, and unzips the DNA molecule.
What is the enzyme mediate unwinding during transcription?
Though RNA polymerase is not biochemically classified as DNA helicase, it is capable of unwinding DNA during transcription.
What is DNA replication called?
semiconservative
DNA replication is called semiconservative because an existing DNA strand is used to create a new strand.
What unwinds a double helix?
Helicase (yellow) unwinds the double helix.
What is the junction between separated strands called?
the junction between separated strands are called. hydrogen bonds. the two sides of the DNA helix are held together by. 4 bonds. the complete name for DNA.
What enzyme builds the mRNA Strand?
RNA polymerase II
During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (Figure 1).
What transcription factor unwinds the DNA during transcription?
On the other hand, rho-dependent terminators make use of a factor called rho, which actively unwinds the DNA-RNA hybrid formed during transcription, thereby releasing the newly synthesized RNA. In eukaryotes, termination of transcription occurs by different processes, depending upon the exact polymerase utilized.
Which enzyme unwinds the DNA during transcription quizlet?
Explanation: RNA polymerase binds to the promoter of the antisense strand and unwinds a section of the DNA molecule during transcription.
How are enzymes and proteins involved in initiation of DNA replication?
During the separation of DNA, the two strands uncoil at a specific site known as the origin. With the involvement of several enzymes and proteins, they prepare (prime) the strands for duplication. At the end of the process, DNA polymerase enzyme starts to organize the assembly of the new DNA strands.
What are the enzymes in DNA replication?
DNA replication requires other enzymes in addition to DNA polymerase, including DNA primase, DNA helicase, DNA ligase, and topoisomerase.
What is meant by topoisomerase?
Definition of topoisomerase : any of a class of enzymes that reduce supercoiling in DNA by breaking and rejoining one or both strands of the DNA molecule.
What elongates as DNA unwinds and is replicated continuously?
During elongation, a primer sequence is added with complementary RNA nucleotides, which are then replaced by DNA nucleotides. During elongation the leading strand is made continuously, while the lagging strand is made in pieces called Okazaki fragments.