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  4. Ribosomes were discovered by :

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Q. Ribosomes were discovered by :

BHUBHU 2001

Solution:

Ribosomes were discovered by Palade $(1955)$ in bean root. These are submicroscopic parricles, seen with the help of electrone microscope. They are composed of $r$-RNA and proteins, present in both eukaryotic and prokaryotic cells. In eukaryotic cells these of larger sized $80 S$ (each unit is $60 S$ and $40 S$ ) and in prokaryotic cells these of smaller sized $70 S$ (each unit is $50 S$ and $30 S$ ).
These attached to endoplasmic reticulum in eukaryotic cells and takes' part in protein synthesis.
Endoplasmic reticulum were discovered by Porter