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Dna Polymerase Synthesises

What is DNA polymerase and how does it function?

What is DNA polymerase and how does it function?

DNA polymerase III (not DNA polymerase) is an enzyme that works in association with other enzymes during the replication of a DNA molecule.

Dna Polymerase Synthesises

One of the most important steps of dna replication is the binding of rna primase in the the initiation point of the 3-5 parent chain. Iv a y-family dna polymerase. You can definitely compare this to complementary base pairing.

Dna polymerase is a catalyst, by catalyzing the synthesis of new dna by adding nucleotides to a preexisting chain. The replication of this template is complicated and the new strand is called lagging strand. The dna strands separate as the hydrogen bonds are broken by dnahelicase.

Some dna polymerases proof read and correct base errors to reduce mutations and conserve the genetic code. Dna replication , the basis for biological inheritance, is a fundamental process occurring in all living organisms to copy their dna. The 3-5 template cannot be readby dna polymerase.

Dna, and as such cannot replicate a short region on the end of each dna molecule on the lagging strand, since replication requires rna primers, and there will be nowhere for the primer to bind (it is later degraded so cannot be kept). It involves ribosomes, trna, andamino acids to manufacture polypeptide chains. Rna polymerase can bind to dna anywhere in the entire genome but sigma factor attaches to polymerase only when it is at promotor.

Short answer there are almost a dozen different types of dna polymerase some may have a subunit that performs the unwinding functions. Error correction is a property of some, but not all, dna polymerases. Dna polymerase adds nucleotides in a 5 to 3 direction.

Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell. The sequence of the telomere is species dependent. Rna polymerase are the wrong sort (ribonucleotides). Dna transcription is the process of copying a dna template onto a messenger rna. The short length of double-stranded nucleic acid that is produced enables dna polymerase to swing into action.

Transcription (biology) - Wikipedia

Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (especially mRNA) by the enzyme RNA polymerase.Both DNA and RNA are nucleic acids, which use base pairs of nucleotides as a complementary language.
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Dna Polymerase Synthesises

What is the third step of DNA replication - Answers.com
the third step in dna replication is when 2 dna double helix form together to form other dna double helix.
Dna Polymerase Synthesises

Actually there are many promoter and many genes but which gene to be transcribed is decided by sigma factor. But dna polymerase cannot get started with a single strand. In the lagging strand the dna pol i - exonuclease -reads the fragments and removes the rna primers.

Members of this family are hence called translesion synthesis (tls) polymerases. In the lagging strand the dna pol i - exonuclease - reads the fragments and removes the rna primers. Then complementary nucleotides line up next to thestrands and dna polymerase joins the nucleotides.

The splitting happens in places of the chains whichare rich in a-t. It results in two identical copies of dna in preparation for the process of mitosis. Interphase is the 1st phase of the cycle and is made-up of 3 phases (g1, s, & g2).

The elongation process is different for the 5-3 and3-5 template. Coli, iii appears to be most important in genome replication and i is important for its ability to edit out unpaired bases at the endstrands. They separate from each other in anaphase os mitosis, producing 2 cells, each with a complete set of genes coded in dna.

The exact mechanism of termination is unknown, but is presumed to be a simple meeting of two replication forks causing the apparatus to stop and dissociate. Replication forks hold the two separated strands of dna apart preventing them from assuming their double helic shape. Depending on the lesion, tls polymerases can bypass the damage in an error-free or error-prone fashion, the latter resulting in elevated mutagenesis.

Dna polymerase polymerizes deoxyribonucleotides to dna, essentially replicating it. Nitrogen bonds floating outside of the nucleus attach with the unzipped dna. In theory, dna replication makes an exact duplicate of the cells original dna in preparation for mitosis. Because of dnas antiparallel structure, the two strands replicate in slightly different ways. Some viruses also encode special dna polymerases, such as hepatitis b virus dna polymerase.

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    Once exposed, the sequence of bases on each of the separated strands serves as a template to guide the insertion of a complementary set of bases on the strand being synthesized. It results in two identical copies of dna in preparation for the process of mitosis. Other members in humans are pol î (iota), pol î (kappa), and rev1 (terminal deoxycytidyl transferase). Dna polymerase i replaces the primers with dna nucleotides...

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    Dnapolymerase reads the template and lengthens the bursts. It is an enzyme and therefore a complex polypeptide, otherwise known as a protein. The splitting happens in places of the chains which are rich in a-t. In prokaryotic cells dna is formed in a loop, two replication forks start along one part of the loop (origin replication) and the replication forks copy dna in opposite directions until they meet at the other side of the loop, making an exact copy of dna...

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    It helps to synthesize and catalyze the bonds between the nucleic acids in dna (adenine, cytosine, guanine, thymine). Introducing genetic mutations is not a function of dna polymerase, but obviously dna polymerases are not perfect at detecting and correcting replication errors. Before the cell divition cell needs to double its genetic meterial then the dna is replicated. Telophase the cell begins to separate into to new daughter cells...

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    Once the strand is complete, dna polymerase i (again, in prokaryotes) replaces the rna primer with dna and ligase joins the gap from where the primer was. Dna stands for deoxyribonucleic acid, so the first part of the name refers to something having to do with our genetic makeup. Dna polymerase i replaces the primers with dna nucleotides...

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    Interphase is the 1st phase of the cycle and is made-up of 3 phases (g1, s, & g2). Unlike rna polymerase, can attach a nucleotide only to the 3 prime end of an existing nucleotide sequence. We can easily understand that inthe last section of the lagging strand, when the rna primer isremoved, it is not possible for the dna polymerase to seal the gap(because there is no primer)...

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