rna meaning

Noun: RNA

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
   - ribonucleic acid

Derived forms: RNAs

Type of: polymer

Encyclopedia: RNA

[Medicine]
A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information,serve as an abundant structural component of cells,and also possesses catalytic activity. (Rieger et al.,Glossary of Genetics: Classical and Molecular,5th ed) n : any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular chemical activities —called also ribonucleic acid —see MESSENGER RNA, RIBOSOMAL RNA, TRANSFER RNA

Examples

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1. during the climacteric may be a transient burst of rna synthesis.
2. messenger rna is templated along only one of the two strands of a dna molecule.
3. a third class of rna is also required for protein synthesis, the ribosomal rna.
4. a third class of rna is also required for protein synthesis, the ribosomal rna.
5. ribose and deoxyribose are constituents of the nucleic acids rna and dna.