definition  of rna
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- RNA. ribonucleic acid: any of a class of single-stranded nucleic acid molecules of ribose and uracil, found chiefly in the cytoplasm of cells and in certain viruses; important in protein synthesis and in the transmission of genetic information transcribed from DNA. Compare messenger RNA, ribosomal RNA, transfer RNA.
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RNA transfer RNA (tRNA) 20 or more varieties of small RNA molecules functioning in translation; each variety carries a specific amino acid to a site specified by an RNA codon, binding to amino acid, ribosome, and to the codon via an anticodon region.
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- Messenger RNA (mRNA) is the RNA that carries information from DNA to the ribosome, the sites of protein synthesis (translation) in the cell. The coding sequence of the mRNA determines the amino acid sequence in the protein that is produced.
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RNA Synonyms for RNA (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes Synonyms
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- The noun RNA has 1 sense: 1. (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell.
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Definitions &Translations Many viruses encode their genetic information using an RNA genome. Some RNA molecules play an active role within cells by catalyzing biological reactions, controlling gene expression, or sensing and communicating responses to cellular signals. One of these active processes is protein synthesis, a universal function where RNA molecules direct the assembly of proteins on ribosomes.
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RNA Messenger RNA (mRNA) is the RNA that carries information from DNA to the ribosome, the sites of protein synthesis (translation) in the cell. The coding sequence of the mRNA determines the amino acid sequence in the protein that is produced.ynthesis of RNA is usually catalyzed by an enzyme— RNA polymerase —using DNA as a template, a process known as transcription. Initiation of transcription begins with the binding of the enzyme to a promoter sequence in the DNA (usually found upstream of a gene).
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Medical Definition of Transcription Transcription: Making an RNA copy from a sequence of DNA (a gene). Transcription is the first step in gene expression.ranscription: Making an RNA copy from a sequence of DNA (a gene). Transcription is the first step in gene expression.
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RNA Definition RNA Definition. RNA is the acronym for ribonucleic acid. Forms of RNA include messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). RNA codes for amino acid sequences, which may be combined to form proteins. Where DNA is used, RNA acts as an intermediary, transcribing the DNA code so that it can be translated into proteins.
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Contents: DNA vs RNA A nucleic acid that contains the genetic instructions used in the development and functioning of all modern living organisms. DNA's genes are expressed, or manifested, through the proteins that its nucleotides produce with the help of RNA. The information found in DNA determines which traits are to be created, activated, or deactivated, while the various forms of RNA do the work.
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MRNA Definition. noun. Abbreviated form for messenger ribonucleic acid, the type of RNA that codes for the chemical blueprint for a protein (during protein synthesis). Supplement. In prokaryotes, mRNA is produced by splicing a large primary transcript from a DNA sequence.
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Uracil: Definition & Structure Definition of Uracil. DNA and RNA are critical to all living things. DNA contains the genetic information that makes every living being what they are and RNA acts as a tool that enables cells to make the proper proteins.DNA and RNA are in the form of strands of molecules.A strand of DNA is composed of four nitrogenous bases known as adenine, guanine, thymine, and cytosine. RNA is different from DNA because it does not have thymine. Instead, it has a base known as uracil.NA and RNA are critical to all living things. DNA contains the genetic information that makes every living being what they are and RNA acts as a tool that enables cells to make the proper proteins. DNA and RNA are in the form of strands of molecules.
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RNA RNA is very similar to DNA, but differs in a few important structural details: RNA is single stranded, while DNA is double stranded. Also, RNA nucleotides contain ribose sugars while DNA contains deoxyribose and RNA uses predominantly uracil instead of thymine present in DNA. RNA is transcribed from DNA by enzymes called RNA polymerases and further processed by other enzymes. RNA serves as the template for translation of genes into proteins, transferring amino acids to the ribosome to form proteins, and also translating the transcript into proteins.
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What is RNA? Ribonucleic acid, or RNA is one of the three major biological macromolecules that are essential for all known forms of life (along with DNA and proteins). A central tenet of molecular biology states that the flow of genetic information in a cell is from DNA through RNA to proteins: “DNA makes RNA makes protein”. Proteins are the workhorses of the cell; they play leading roles in the cell as enzymes, as structural components, and in cell signaling, to name just a few.
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Contents: DNA vs RNA Definition. A nucleic acid that contains the genetic instructions used in the development and functioning of all modern living organisms. DNA's genes are expressed, or manifested, through the proteins that its nucleotides produce with the help of RNA. The information found in DNA determines which traits are to be created, activated, or deactivated, while the various forms of RNA do the work.
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Medical Definition of Deoxyribonucleic acid DNA: Deoxyribonucleic acid. One of two types of molecules that encode genetic information. (The other is RNA. In humans DNA is the genetic material; RNA is transcribed from it. In some other organisms, RNA is the genetic material and, in reverse fashion, the DNA is transcribed from it.).DNA is a double-stranded molecule held together by weak hydrogen bonds between base pairs of nucleotides.The molecule forms a double helix in which two strands of DNA spiral about one other.n humans DNA is the genetic material; RNA is transcribed from it. In some other organisms, RNA is the genetic material and, in reverse fashion, the DNA is transcribed from it.). DNA is a double-stranded molecule held together by weak hydrogen bonds between base pairs of nucleotides.
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MRNA 1. the template for protein synthesis; the form of RNA that carries information from DNA in the nucleus to the ribosome sites of protein synthesis in the cell. Familiarity information: MRNA used as a noun is very rare. Dictionary entry details.
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MRNA The template for protein synthesis; the form of RNA that carries information from DNA in the nucleus to the ribosome sites of protein synthesis in the cell.
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MRNA RNA [BACK TO TOP]. Meaning: (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell.Classified under:Nouns denoting substances.biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell. Classified under: Nouns denoting substances.
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RNA ribonucleic acid: any of a class of single-stranded molecules transcribed from DNA in the cell nucleus or in the mitochondrion or chloroplast, containing along the strand a linear sequence of nucleotide bases that is complementary to the DNA strand from which it is transcribed: the composition of the RNA molecule is identical with that of DNA except ...
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- Definition. noun, plural: tRNAs. RNA involved in protein synthesis, i.e. transporting specific amino acid to the ribosome to be added onto the growing polypeptide chain. Supplement. tRNA molecule has these two important regions: 1  trinucleotide region containing the anticodon. 2  attachment site for a specific amino acid.
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Acronyms finder Roles of RNA in Cells. RNA, in one form or another, touches nearly everything in a cell. RNA carries out a broad range of functions, from translating genetic information into the molecular machines and structures of the cell to regulating the activity of genes during development, cellular differentiation, and changing environments.
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RNA RNA is assembled as a chain of nucleotides, that is usually  single-stranded. In eukaryotic cells, it can be found in the  nucleus and cytoplasm. Edit. Share to: Lsilvstew. 2,538 Contributions. Answered Most Recently. In Genetics.
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RNA RNA is an acronym for ribonucleic acid, a nucleic acid. Many different kinds are now known. RNA is physically different from DNA: DNA contains two intercoiled strands, but RNA only contains one single strand. RNA also contains different bases from DNA. These bases are the following: (A) Adenine (G) Guanine (C) Cytosine (U) Uracil
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RNA Ribonucleic acid (RNA) is a polymeric molecule implicated in various biological roles in coding, decoding, regulation, and expression of genes. RNA and DNA are nucleic acids, and, along with proteins and carbohydrates, constitute the three major macromolecules essential for all known forms of life.essenger RNA (mRNA) is the RNA that carries information from DNA to the ribosome, the sites of protein synthesis (translation) in the cell. The coding sequence of the mRNA determines the amino acid sequence in the protein that is produced.
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What Is RNA? RNA stands for ribonucleic acid and like DNA, RNA nucleotides contain three components: RNA nitrogenous bases include adenine (A), guanine (G), cytosine (C) and uracil (U). The five-carbon (pentose) sugar in RNA is ribose. RNA molecules are polymers of nucleotides joined to one another by covalent bonds between the phosphate of one nucleotide and the sugar of another. These linkages are called phosphodiester linkages.