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ribonuclease:
Enzyme that cuts an RNA molecule by hydrolyzing one or more of
its phosphodiester bonds.
ribosomal RNA (rRNA):
Any one of a number of specific RNA molecules that form part of
the structure of a ribosome and participate in the synthesis of
proteins. Often distinguished by their sedimentation coefficient,
such as 28S rRNA or 5S rRNA.
ribosome:
Particle composed of ribosomal RNAs and ribosomal proteins that
associates with messenger RNA and catalyzes the synthesis of protein.
RNA (ribonucleic acid):
Polymer formed from covalently linked ribonucleotide monomers.
RNA polymerase:
Enzyme that catalyzes the synthesis of an RNA molecule on a DNA
template from nucleoside triphosphate precursors.
RNA splicing:
Process in which intron sequences are excised from RNA molecules
in the nucleus during formation of messenger RNA.
rough endoplasmic reticulum (RER):
Region of the endoplasmic reticulum associated with ribosomes;
involved in the synthesis of secreted and membrane-bound proteins.
rRNA:
see ribosomal RNA
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