What is the role of DNA ligase in the elongation?

What is the role of DNA ligase in the elongation of the lagging strand during DNA replication? It joins Okazaki fragments together.

What is elongation in replication?

Elongation. During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3′ end of the newly synthesized polynucleotide strand. The template strand specifies which of the four DNA nucleotides (A, T, C, or G) is added at each position along the new chain.

What happens during the elongation?

During the elongation stage, the ribosome continues to translate each codon in turn. Each corresponding amino acid is added to the growing chain and linked via a bond called a peptide bond. Elongation continues until all of the codons are read.

What is elongation and termination?

Elongation synthesizes pre-mRNA in a 5′ to 3′ direction, and termination occurs in response to termination sequences and signals.

What happens in the elongation stage of replication quizlet?

Explain elongation stage of replication – you answer should include a discussion of leading strand, lagging strand, Okazaki pieces and RNA primer. Primes adds primer near inside of the fork. DNA polymerase III adds nucleotides 5′ and 3′. DNA polymerase I takes away RNA primer and replaces it with DNA nucleotides.

What part of DNA replication does DNA ligase play in the elongation of the lagging strand?

On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule. Helicase opens up the DNA at the replication fork.

What is the elongation?

Medical Definition of elongation 1 : the state of being elongated or lengthened also : the process of growing or increasing in length chain elongation in DNA synthesis the elongation of a muscle under tension. 2 : something that is elongated.

What is initiation elongation and termination?

There are three important steps to the process of translation. There’s a beginning step, called initiation, a middle step, called elongation, and a final step, called termination. These three words may sound familiar to you.

What is the process of elongation?

Elongation is the addition of nucleotides to the mRNA strand. RNA polymerase reads the unwound DNA strand and builds the mRNA molecule, using complementary base pairs. During this process, an adenine (A) in the DNA binds to an uracil (U) in the RNA.

What is the main event of translation elongation?

Elongation is the stage where the amino acid chain gets longer. In elongation, the mRNA is read one codon at a time, and the amino acid matching each codon is added to a growing protein chain.

Where does elongation occur in the cell?

In higher plants where most growth occurs by cell elongation, cell division takes place in localized regions called meristems which are found at root and shoot tips. Both primary and secondary growth in plants are associated with zones in which cells are rapidly dividing.

What happens during elongation in translation quizlet?

During the elongation step of transcription, the RNA molecule is stretched out to full length. During the elongation step of translation, the protein molecule is stretched out to full length.

What is the function of the elongation elongation strand?

Elongation Elongation is used as a template for RNA synthesis (non-coding strand) or the template strand is one strand of the DNA. Transfer progresses, RNA polymerase intersect the template strand, using the complementary base pairs in the DNA template to create a copy of the RNA.

What is the role of DNA ligase in DNA cloning?

In addition, DNA ligase has extensive use in molecular biology laboratories for recombinant DNA experiments (see Research applications ). Purified DNA ligase is used in gene cloning to join DNA molecules together to form recombinant DNA . The image demonstrates how ligase (yellow oval) catalyzes two DNA fragment strands.

What is the role of transcription elongation in gene expression?

Over the years, transcription elongation is considered as a trivial addition of ribonucleoside triphosphates into mRNA chain growth. This, it is a regulatory step highly dynamic and transcription cycle that can this process to adjust the downstream event is immediately obvious.

What is the origin of DNA ligase?

The common commercially available DNA ligases were originally discovered in bacteriophage T4, E. coli and other bacteria.