RNA


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RNA

 
messenger RNA (mRNA) see ribonucleic acid.
ribosomal RNA (rRNA) see ribonucleic acid.
transfer RNA (tRNA) see ribonucleic acid.

RNA

Abbreviation for ribonucleic acid; Registered Nurse Anesthetist. For terms bearing this abbreviation, see subentries under ribonucleic acid

RNA

(är′ĕn-ā′)
n.
A nucleic acid present in all living cells and many viruses, consisting of a long, usually single-stranded chain of alternating phosphate and ribose units, with one of the bases adenine, guanine, cytosine, or uracil bonded to each ribose molecule. RNA molecules are involved in protein synthesis and sometimes in the transmission of genetic information. Also called ribonucleic acid.

RNA

 Ribonucleic acid Molecular biology A polymer of ribonucleic acids that functions in coding, storage, transfer and translation of genetic information. See Antisense RNA, Catalytic RNA, Chromosomal RNA, Heterogenous nuclear RNA, Pre-mRNA, Ribosomal RNA, Transfer RNA.

RNA

Abbreviation for ribonucleic acid.

RNA

Abbrev. for ribonucleic acid. This molecule, in common with DNA and MITOCHONDRIAL DNA, carries coded instructions for the synthesis of specific proteins from AMINO ACIDS. RNA may be a double chain like DNA but in the cell usually exists as a single polynucleotide chain, like one strand of the double helix of DNA. Whereas in most cells DNA carries the permanent, inheritable code for cell reproduction, RNA most commonly acts as a transcriber or as MESSENGER RNA (mRNA) carrying the code elsewhere, as to the RIBOSOMES in cells where proteins are actually formed. In some viruses, however, the inherited code for replication occurs in the form of RNA. Transfer RNA (tRNA) picks up and carries amino acids to the ribosomes to be inserted in the correct sequence of the protein. Ribosomes contain ribosomal RNA (rRNA) and proteins.RNA can take up complex three-dimensional configurations an can act as an enzyme with itself as substrate. It seems likely that RNA preceded DNA in evolution.

RNA (ribonucleic acid)

a NUCLEIC ACID generally composed of a single POLYNUCLEOTIDE CHAIN of RIBONUCLEOTIDES,which is found in cells of both prokaryotes and eukaryotes. RNA is a vital component of PROTEIN SYNTHESIS, and occurs in three main forms:
  1. (a) MESSENGER RNA produced in TRANSCRIPTION and involved in transferring genetic information from DNA to RIBOSOMES;
  2. (b) RIBOSOMAL RNA forming a major structural component of the ribosomes;
  3. (c) TRANSFER RNA which acts as an ‘adaptor’ molecule and carries amino acids to the ribosomes to be inserted in the correct sequence during translation. RNA is also found in some viruses as the primary genetic material. Other types of RNA have regulatory roles; see, for example, ANTISENSE RNA; or processing roles, for example snRNA.

RNA

Abbreviation for ribonucleic acid.
References in periodicals archive ?
"You can think of these RNA enzymes like a car being produced in an assembly line," said Poudyal.
The researchers studying tomatoes and Prunus plants used LCM to preserve the heterogeneity of their tissue samples, but like the dilemma cancer researchers face, they needed to maintain RNA integrity at the same time.
After incubation at -20[degrees]C for 1 h, RNA was precipitated by centrifugation at 15,000 g for 5 min.
A second reason is an extension of this, in which we consider that RNA is a marker for not just gene (and thus organism) presence but more specifically for its biological activity as evidenced by ongoing gene expression.
But with the RNA spray technology, which Monsanto calls BioDirect, the company may have found something that will bedevil opponents.
We aimed to design a simple, fast, and cost-effective method for complete RNA extraction that utilized the least amount of pancreatic tissue.
To test how early cell-like structures could have formed and acted to compartmentalize RNA molecules even in the absence of lipid-like molecules that make up modern cellular membranes, Strulson and Molden generated simple, non-living model "cells" in the laboratory.
Results from RT-PCR experiment confirmed that RNA was functional.
Researchers can use the new RNA capture kits to combine targeted genome and transcriptome data in a single experiment for "integrated biology" insight into the sample.
Scientists already knew that every now and then RNA letters can be chemically modified or edited--sort of the molecular equivalent of adding an umlaut to some letters.
RNA worlds; from life's origins to diversity in gene regulation.
The method they have discovered involves an important class of molecules produced by DNA called ribonucleic acid or RNA. In a study recently conducted by Parissenti and his colleagues, small samples at the center of tumours were removed from locally advanced breast cancer patients pre-, mid-, and post-chemotherapy as part of a national clinical trial.