![]() ![]() The translation of codons into amino acids requires two other types of RNA: transfer RNA, which recognizes the codon and provides the corresponding amino acid, and ribosomal RNA (rRNA), the central component of the ribosome's protein-manufacturing machinery. Each codon codes for a specific amino acid, except the stop codons, which terminate protein synthesis. All of these processes form part of the central dogma of molecular biology, which describes the flow of genetic information in a biological system.Īs in DNA, genetic information in mRNA is contained in the sequence of nucleotides, which are arranged into codons consisting of three ribonucleotides each. Mature mRNA is then read by the ribosome, and, utilising amino acids carried by transfer RNA (tRNA), the ribosome creates the protein. This exon sequence constitutes mature mRNA. These are removed in the process of RNA splicing, leaving only exons, regions that will encode the protein. This pre-mRNA usually still contains introns, regions that will not go on to code for the final amino acid sequence. MRNA is created during the process of transcription, where an enzyme ( RNA polymerase) converts the gene into primary transcript mRNA (also known as pre-mRNA). In molecular biology, messenger ribonucleic acid ( mRNA) is a single-stranded molecule of RNA that corresponds to the genetic sequence of a gene, and is read by a ribosome in the process of synthesizing a protein. RNA is transcribed in the nucleus after processing, it is transported to the cytoplasm and translated by the ribosome. The "life cycle" of an mRNA in a eukaryotic cell. Not to be confused with Mitochondrial DNA (m(t)DNA) or micro RNA (miRNA). ![]()
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