TrinicenterTrinicenter HomepageTrinicenter

How cells make protein molecules

One of the most important tasks of any living cell is making the protein molecules that form its internal structures, trigger important chemical reactions, and fill many other roles. How are protein molecules made?

Protein molecules are assembled from simple molecules called amino acids by molecular machines called ribosomes, themselves made largely out of protein. A ribosome starts making a protein by catching the end of a molecule called messenger RNA, which contains the coded instructions to make the protein.

The messenger RNA (which was created by reading DNA in the cell's nucleus) feeds through the ribosome like a ribbon, and as it feeds through its code is read. The ribosome recognizes the pattern of code, and adds the appropriate amino acids to the partially completed protein. When the protein molecule is finished, it is released and the ribosome can begin building another one.

One of the best images (so far) of a ribosome:

Detailed, illustrated explanations of ribosomes:

Your body is glued together by protein molecules:

Your muscles are mostly made of protein:

Homepage | Home
TrinicenterTop of page | Trinicenter Home | About Us | E Mail UsTrinicenter