Ribosomes and Translation
In the cells of your body, and every other living organism, a process called protein synthesis is occurring constantly. In this process single amino acids are carried by messenger tRNA to the ribsosomes wherein the ribosome catalyzes the joining of these amino acids.
This is the process of translation; where mRNA is used as a template to organise the amino acids in the correct order.
Ribosomes are made of two subunits, one smaller and one larger. The ribosome will surround the mRNA as it makes its way along the strand of mRNA. This allows the strand of mRNA to be reused if necessary. There may also be more than one ribosome attached to the strand at any one time.
The polypeptide chain produced after this process may be exported from the cell, or moved around the cell using vesicles and motor proteins.
Image via mrc.lmb.cam.ac.uk