Ribosomes are sites for

🔑Key Points:
Ribosomes are membranous granular structures present in the cytoplasm.
They were first observed under an electron microscope as dense particles by George Palade in the year 1953.
Ribosomes are the site for ''protein synthesis'' so they are also called the ''protein factory'' of the cell.
There are two types of ribosomes
Eukaryotic ribosomes – 80s – occurs in the cytoplasm of eukaryotic cell
Prokaryotic ribosomes – 70s – occur in the cytoplasm as well as are associated with the cell membrane of prokaryotic cell.

• The subunits of the ribosomes are:
80s ribosomes – are made of 60s and 40s subunits.
70s ribosomes – are made of 50s and 30s subunits.

🛑Important Points:

• Composition of the structure of ribosome:
They are composed of ribonucleic acid (RNA) and proteins