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 ?
These compartments ensure that all the components for the chemical reactions of life are in easy reach, but in the prebiotic world the building blocks for RNA -- or the RNA enzymes needed to drive the chemical reactions that could lead to life -- would probably have been scarce, floating around in the primordial soup.
RNA was precipitated by centrifugation at 15,000 g for 5 min and washed with 70% ethanol as described in method I.
Interestingly, we found that the expression of most TTSa-RNAs is increased in cancer tissues, suggesting a general deregulation of this class of RNAs rather than overexpression of a few TTSa-RNAs (Supplementary Figure 3).
The quality of purified RNA from tissues and cells is variable.
She said that importantly, they showed that they could remove the toxic RNA without affecting the normal RNA that encodes the C9orf72 protein.
One of the most famous long noncoding RNAs, known as XIST, is also one of the most hands-on.
To determine the total amount of RNA per cell, it is necessary to extract the RNAs and other macromolecules from the yeast cells.
Aptamers, on the other hand, are synthetic RNAs or modified synthetic RNAs generated ex vivo for potential thera peutic roles.
The emerging interest in using RNA-tumor marker detection in whole urine for the diagnosis of other tumor entities (16,17) accentuates the need to investigate the variability and source of RNA species in whole urine.
Our new system for rapid determination of viral RNA sequence (RDV) uses whole-genome amplification and direct sequencing techniques (Figure 1).
The RNA world refers to a hypothetical stage of the earth's evolution before the mechanism of protein synthesis became the main basis of genetic catalysis.