Ribosomes (from ribonucleic acid and "greek: soma (meaning body)") are complexes of RNA and protein that are found in all cells.
Ribosomes
Ribosomes are the protein-synthesizing machines of the cell.
They translate the information encoded in messenger RNA (mRNA) into a polypeptide.
ribosome
a ribonucleoprotein particle found in the cytoplasm on which protein synthesis takes place
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Ribosomes consist of two subunits (Figure 1) that fit together (Figure 2) and work as one to translate the mRNA into a polypeptide chain during protein synthesis (Figure 3).
Ribosomes of prokaryotes (e.g. bacteria) are smaller than most of the ribosomes of eukaryotes (e.g. plants and animals).
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Definition of ribosome : ...
The region of an mRNA molecule that binds the ribosome to initiate translation.
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Ribosomes
All living cells contain ribosomes, tiny organelles composed of approximately 60 percent ribosomal RNA (rRNA) and 40 percent protein.
Ribosomes - Protein Construction Teams
Cells need to make proteins. Those proteins might be used as enzymes or as support for other cell functions. When you need to make proteins, you look for ribosomes.
Ribosome
A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell.
ribosome -- (ribosomal RNA)
rift -- n. A long, narrow crack in the entire thickness of the Earth's crust, which is bounded by normal faults on either side and forms as the crust is pulled apart; v. To split the Earth's crust; rift zone- n.
ribosomes Small organelles made of rRNA and protein in the cytoplasm of prokaryotic and eukaryotic cells; aid in the production of proteins on the rough endoplasmic reticulum and ribosome complexes. The site of protein synthesis.
Ribosome : The small cellular structure in which RNA translates the genetic code into proteins.
RNA: See Ribonucleic acid.
Sequence: See Base sequence.
ribosome
A cell organelle constructed in the nucleolus, functioning as the site of protein synthesis in the cytoplasm. Consists of rRNA and protein molecules, which make up two subunits.
ribozyme ...
Ribosome binding site
A short nucleotide sequence upstream of a gene which forms the site on the mRNA molecule where the ribosome binds. (Also called a Shine-Delgarno sequence.) ...
Ribosome (RYE-bo-sohm) A molecular complex in which proteins are made. In eukaryotic cells, ribosomes either are free in the cytoplasm or are attached to the rough endoplasmic reticulum.
Ribosomes are the tiny structures where proteins synthesis occurs. They are not membrane-bound and occur in all cells, although there are differences between the size of subunits in eukaryotic and prokaryotic ribosomes.
Ribosomes: Small cellular components composed of specialized ribosomal RNA and protein; site of protein synthesis. See ribonucleic acid (RNA).
RNA: See ribonucleic acid.
S ...
ribosome - protein synthesis 'machine,' made of ribosomal RNAs and proteins.
RNA polymerase - protein that synthesizes RNA from ribonucleotide precursors, using a DNA template.
senescence - aging.
Ribosome A ribonucleoprotein complex which translates mRNAs. See your textbooks! ...
Ribosome. Cellular organelle that is the site of protein synthesis during translation. See Organelle, Translation.
Ribosome-binding site. The region of an mRNA molecule that binds the ribosome to initiate translation.
ribosome
a cell organelle constructed in the nucleolus, consisting of two subunits and functioning as the site of protein synthesis in the cytoplasm.
Ribosomes
Ribosomes read the code in mRNA and synthesize protein accordingly.
The symbols to the left are used in the drawings of protein synthesis below.
Ribosome A large ribonucleoprotein assembly that catalyzes the formation of peptide bonds; a molecular machine that coordinates protein synthesis.
Ribozymes RNA molecules that display enzymatic activity.
Ribosome with mRNA being translated into a protein
Outside the nucleus is the cytoplasm which contains a variety of biomolecules, membranes, and organelles. There is a system of membranes known as the endoplasmic reticulum.
Ribosome
The term proposed by Roberts (1958)for the small cellular components (Gk. soma, body) composed of specialized ribosomal RNA and protein (ribonucleoprotein); site of protein synthesis.
Ribosomes give the cytoplasm of bacteria a granular appearance in electron micrographs.
Ribosomes
Protein and RNA complex responsible for protein synthesis.
Smooth endoplasmic reticulum (SER)
A network of interconnected membranes forming channels within the cell. A site for synthesis and metabolism of lipids.
Ribosome
- An organelle, consisting of two subunits of RNA and proteins, that synthesizes polypeptide whose amino acid sequences are specified by the nucleotide sequences of the mRNA
Rice ...
ribosome - a complex of more than 50 different proteins associated with several structuralRNA molecules (rRNA's) ...
ribosome Subcellular structure composed of protein and ribonucleic acid. May be free in the cytoplasm or attached to the membranes of the endoplasmic reticulum; functions in protein synthesis.
RIBOSOME - A complex ribonucleoprotein particle (eukaryotic ribosomes contain 4 RNAs and at least 82 proteins) which is the "machine" which translates mRNA into protein molecules.
Ribosome: A cellular particle which is involved in the translation of mRNAs to make proteins. Ribosomes are a complex consisting of ribosomal RNAs (rRNA) and several proteins.
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The ribosome is the main machine in the cell. It is the molecular mechanism that takes the information stored in the gene and translates it into information in protein sequence.
An antibiotic of the aminoglycoside family that poisons translation by binding to the ribosomes. See Kanamycin. kanr. Kanamycin resistance gene. (See Selectable marker.) Karyotype.
The rRNAs constitute the catalytic and structural components of the ribosome, the protein synthesis machinery of cells. The level of rRNA synthesis, mediated by Pol I (RNA polymerase I), therefore has a major impact on the life and destiny of a cell.
The matrix of a cell that contains the ribosomes, the cytoskeleton and different aggregates of storage compounds. Nucleus, cytoplasm, plastids, mitochondria and membrane form the cell.
Related Terms:
Ribosome ...
Ribosomal RNA (rRNA) A class of RNA found in the ribosomes of cells.
Ribosomes Small cellular components composed of specialised ribosomal RNA and protein; site of protein synthesis. See ribonucleic acid (RNA).
"Blueprint" for protein synthesis that is transcribed from one strand of the DNA (gene) and which is translated at the ribosome into a polypeptide sequence.
A class of small RNAs used by the cell to carry amino acids to the enzyme complex (the ribosome) which builds proteins, using an mRNA as a guide.
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Downstream: The direction which RNA polymerase moves during transcription (5' to 3') and ribosomes moves during translation.
The components of a typical prokaryotic cell are a cell wall, a cytoplasmic membrane, a single molecule of DNA, ribosomes and the cytoplasm. All other components, although they might be present, are essentially dispensable.
Cells transcribe a DNA gene into an RNA version of the gene, and a ribosome then translates the RNA into a protein, a sequence of amino acids.
These substances are organized to constitute the living organelles, as endoplasmic reticulum, ribosomes, chloroplasts, mitochondria, Golgi apparatus, nucleolus, nucleus, lysosomes, vacuoles, and centrosomes.
ribosomal RNA The transcribed product of ribosomal DNA, also known as rRNA. These rRNA's are part of the ribosome ...
(tRNA) A class of RNA having structures with triplet nucleotide sequences that are complementary to the triplet nucleotide coding sequences of mRNA. The role of tRNAs in protein synthesis is to bond with amino acids and transfer them to the ribosomes, ...
Messenger RNA is then translated via cellular machinery called ribosomes into a string of amino acids -- a protein. Some proteins function as enzymes, catalysts that speed the chemical reactions in cells.
by the possession of a simple naked DNA chromosome, occasionally two such chromosomes, usually of circular structure, without a nuclear membrane and possessing a very small range of organelles, generally only a plasma membrane and ribosomes.
The vector may also carry a ribosome binding sequence (for bacterial expression) and a start codon, depending on the nature of the inserted DNA. Some expression vectors produce fusion proteins.
Ribosomes - extremely small grain-like organelle that provides the sites for protein synthesis (they may be free in the cytoplasm or attached to the endoplasmic reticulum) ...
 See also: Protein, Trans, Proteins, Cell, DNA
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