Page 17 - The Cell and Its Components

include the nucleus and the mitochondria.

Ribosome Structure
The ribosome has two main components called the large
subunit and the small subunit. These two units come
together when the ribosome is ready to make a new
protein. Both of the subunits consist of strands of RNA
and various proteins.
 Large subunit - The large subunit contains the site
where new bonds are made when creating
proteins. It is called the "60S" in eukaryotic cells
and the "50S" in prokaryotic cells.
 Small subunit - The small subunit really isn't that
small, just a bit smaller than the large subunit. It is
responsible for the flow of information during
protein synthesis. It is called the "40S" in
eukaryotic cells and the "50S" in prokaryotic cells.

The "S" in the subunit names is a unit of measure and
stands for the Svedberg unit.