Ribosome

A ribosome is an organelle composed of rRNA and ribosomal proteins. It translates mRNA into a polypeptide chain (e.g., a protein).

Related Topics:
Organelle - RRNA - Translates - MRNA - Polypeptide - Protein

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It can be thought of as a factory that builds a protein from a set of genetic instructions. Ribosomes can float freely in the cytoplasm (the internal fluid of the cell) or bind to another organelle called the endoplasmic reticulum, or to the nuclear envelope. Since ribosomes are ribozymes, it is thought that they might be remnants of the RNA world.

Related Topics:
Cytoplasm - Endoplasmic reticulum - Nuclear envelope - Ribozyme - RNA world

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