Lexic.us

Definition of Ribosome

1. Noun. An organelle in the cytoplasm of a living cell; they attach to mRNA and move down it one codon at a time and then stop until tRNA brings the required amino acid; when it reaches a stop codon it falls apart and releases the completed protein molecule for use by the cell. "The ribosome is the site of protein synthesis"

Definition of Ribosome

1. Noun. (biology) Small organelles found in all cells; involved in the production of proteins by translating messenger RNA. ¹

¹ Source: wiktionary.com

Definition of Ribosome

1. a particle composed of protein and ribonucleic acid [n -S]

Medical Definition of Ribosome

1. A small particulate organelle found in prokaryotes and eukaryotes and also within mitochondria and chloroplasts, but differing in size and composition. Made of two subunits, each being an RNA protein complex. Ribosomes are responsible for the translation of mRNA which may occur in the cytoplasm (see polyribosomes) or on rough endoplasmic reticulum. Origin: Gr. Soma = body This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Ribosome Pictures

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Lexicographical Neighbors of Ribosome

Literary usage of Ribosome

Below you will find example usage of this term as found in modern and/or classical literature:

1. Science by American Association for the Advancement of Science (1883)
"Another protein (305-11) must be present in the ribosome to prevent a high frequency of spontaneous errors (34). If a simple hydrogen-bonded association of ..."

2. Inside the Cell by Maya Pines (1990)
"Each ribosome is made of two unequally sized subunits, ... Each ribosome in a single E. coli, for example, can link 15 amino acids in a second. ..."

3. Biographical Memoirs by National Academy Of Sciences, National Academy of Sciences Staff, Caroline K. McEuen (1980)
"It appeared that the ribosome was then so distorted as to function usefully only in the presence of an agent causing translational ambiguity. ..."

4. Visualizing Chemistry: The Progress and Promise of Advanced Chemical Imaging by National Research Council (U.S.) (2006)
"Arrows mark points at which tRNA contacts the surrounding ribosome mass. ... Solution structure of the E. coli 70S ribosome at 11.5 A resolution. ..."

5. In the Matter of Certain Recombinantly Produced Human Growth Hormones by DIANE Publishing Company (1997)
"The ribosome associates with the mRNA at a specific site, the "ribosome ... The ribosome moves along the mRNA, and the information encoded in the mRNA is ..."

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