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What is mRNA?

What is mRNA?
Messenger RNA is the same as mRNA. What exactly is this mRNA? It is a RNA molecule, which is responsible for encoding chemical outline for protein product. The primary role of mRNA is to transport instructions coming from genes. These instructions are coded and carried forward to other cell parts. The coded instructions have something to do with the production of proteins essential to several functions of a cell.

Genes of a cell has three elements. The first element is the promoter, which acts like a switch. The second element is the coding region, which houses the code holding the instructions for particular synthesis of protein. The last element is the termination sequence, which is a particular portion of a gene that indicates the end of a specific code section.

To fulfill the function of mRNA, an important enzyme must be present in the nucleus of a cell. This enzyme is known as RNA polymerase, which acts similarly like a catalyst. A catalyst is a kind of substance that smoothes the progress of a particular reaction. On the other hand even at the event of a particular reaction, the catalyst’s characteristics remain unchanged or not even used up itself.

RNA polymerase interprets the code sequence from the DNA of genes. After which, the code is translated into an mRNA sequence. The process goes as the RNA polymerase picks up a sign to commence the coding from the promoter. Then, the enzyme links to a DNA molecule segment to start deciphering the code.

How does code reading process happen?

The enzyme, which is also the RNA polymerase, connects itself to the DNA and unlocks a segment of it. The enzyme commences interpreting one side of the DNA. Then, the enzyme draws in the nucleotides and joins them to the code it has been reading from the other side of the DNA. This process creates a copy of that section of the DNA. This process of creating a replica is called the transcription.

Upon reaching the terminator sequence, the transcription that the enzyme has begun comes to an immediate halt. After the process of transcription comes a brand new strand of mRNA. This means that the new mRNA exists as an independent entity. It is an entity considered to carry the code from the key segment of the DNA.

The creation of a new mRNA strand will signal the separation of itself and the RNA polymerase from the DNA of a particular gene. The original mRNA will fold over and the remaining two halves of the DNA reconnect. This will result to the closing of DNA containing the original code in one piece.

The process will be repeated to other regions of the cells. The assembled mRNA will continue to pass on the code and help the cells with their protein production. The proteins are manufactured by the binding of mRNA and ribosome. Proteins are produced in the ribosomes with the aid of amino acids. The mRNA plays as the backbone of the protein production process by providing the vital code from the DNA of genes.

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Posted by Jodel X on Mar 6th, 2011 and filed under Biology. You can follow any responses to this entry through the RSS 2.0. You can leave a response via following comment form or trackback to this entry from your site