Ribosomes are of 70S and 80S types seen in a cell. Which of the following statement is CORRECT regarding ‘S’?

Concept-
Ribosomes are first observed under the electron microscope by George Palade.
They are composed of ribonucleic acid and protein and are not surrounded by any membrane.
They are the site of protein synthesis.
There are two types of ribosome
Eukaryotic ribosomes-  80s
Prokaryotic ribosomes-  70s
Explanation-
S = Svedberg unit or sedimentation rate.
It indirectly is a measure of density and size.

🔑Key Points:
Ribosomes are also called “Organelle within an organelle” and “Protein factory of the cell”
Ribosomes are the smallest cell organelles.
Ribosomes are organelle without membranes.